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Diffstat (limited to 'doc/example-config/conf.d')
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diff --git a/doc/example-config/conf.d/10-auth.conf b/doc/example-config/conf.d/10-auth.conf new file mode 100644 index 0000000..3e9c4e4 --- /dev/null +++ b/doc/example-config/conf.d/10-auth.conf @@ -0,0 +1,127 @@ +## +## Authentication processes +## + +# Disable LOGIN command and all other plaintext authentications unless +# SSL/TLS is used (LOGINDISABLED capability). Note that if the remote IP +# matches the local IP (ie. you're connecting from the same computer), the +# connection is considered secure and plaintext authentication is allowed. +# See also ssl=required setting. +#disable_plaintext_auth = yes + +# Authentication cache size (e.g. 10M). 0 means it's disabled. Note that +# bsdauth and PAM require cache_key to be set for caching to be used. +#auth_cache_size = 0 +# Time to live for cached data. After TTL expires the cached record is no +# longer used, *except* if the main database lookup returns internal failure. +# We also try to handle password changes automatically: If user's previous +# authentication was successful, but this one wasn't, the cache isn't used. +# For now this works only with plaintext authentication. +#auth_cache_ttl = 1 hour +# TTL for negative hits (user not found, password mismatch). +# 0 disables caching them completely. +#auth_cache_negative_ttl = 1 hour + +# Space separated list of realms for SASL authentication mechanisms that need +# them. You can leave it empty if you don't want to support multiple realms. +# Many clients simply use the first one listed here, so keep the default realm +# first. +#auth_realms = + +# Default realm/domain to use if none was specified. This is used for both +# SASL realms and appending @domain to username in plaintext logins. +#auth_default_realm = + +# List of allowed characters in username. If the user-given username contains +# a character not listed in here, the login automatically fails. This is just +# an extra check to make sure user can't exploit any potential quote escaping +# vulnerabilities with SQL/LDAP databases. If you want to allow all characters, +# set this value to empty. +#auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@ + +# Username character translations before it's looked up from databases. The +# value contains series of from -> to characters. For example "#@/@" means +# that '#' and '/' characters are translated to '@'. +#auth_username_translation = + +# Username formatting before it's looked up from databases. You can use +# the standard variables here, eg. %Lu would lowercase the username, %n would +# drop away the domain if it was given, or "%n-AT-%d" would change the '@' into +# "-AT-". This translation is done after auth_username_translation changes. +#auth_username_format = %Lu + +# If you want to allow master users to log in by specifying the master +# username within the normal username string (ie. not using SASL mechanism's +# support for it), you can specify the separator character here. The format +# is then <username><separator><master username>. UW-IMAP uses "*" as the +# separator, so that could be a good choice. +#auth_master_user_separator = + +# Username to use for users logging in with ANONYMOUS SASL mechanism +#auth_anonymous_username = anonymous + +# Maximum number of dovecot-auth worker processes. They're used to execute +# blocking passdb and userdb queries (eg. MySQL and PAM). They're +# automatically created and destroyed as needed. +#auth_worker_max_count = 30 + +# Host name to use in GSSAPI principal names. The default is to use the +# name returned by gethostname(). Use "$ALL" (with quotes) to allow all keytab +# entries. +#auth_gssapi_hostname = + +# Kerberos keytab to use for the GSSAPI mechanism. Will use the system +# default (usually /etc/krb5.keytab) if not specified. You may need to change +# the auth service to run as root to be able to read this file. +#auth_krb5_keytab = + +# Do NTLM and GSS-SPNEGO authentication using Samba's winbind daemon and +# ntlm_auth helper. <doc/wiki/Authentication/Mechanisms/Winbind.txt> +#auth_use_winbind = no + +# Path for Samba's ntlm_auth helper binary. +#auth_winbind_helper_path = /usr/bin/ntlm_auth + +# Time to delay before replying to failed authentications. +#auth_failure_delay = 2 secs + +# Require a valid SSL client certificate or the authentication fails. +#auth_ssl_require_client_cert = no + +# Take the username from client's SSL certificate, using +# X509_NAME_get_text_by_NID() which returns the subject's DN's +# CommonName. +#auth_ssl_username_from_cert = no + +# Space separated list of wanted authentication mechanisms: +# plain login digest-md5 cram-md5 ntlm rpa apop anonymous gssapi otp +# gss-spnego +# NOTE: See also disable_plaintext_auth setting. +auth_mechanisms = plain + +## +## Password and user databases +## + +# +# Password database is used to verify user's password (and nothing more). +# You can have multiple passdbs and userdbs. This is useful if you want to +# allow both system users (/etc/passwd) and virtual users to login without +# duplicating the system users into virtual database. +# +# <doc/wiki/PasswordDatabase.txt> +# +# User database specifies where mails are located and what user/group IDs +# own them. For single-UID configuration use "static" userdb. +# +# <doc/wiki/UserDatabase.txt> + +#!include auth-deny.conf.ext +#!include auth-master.conf.ext + +!include auth-system.conf.ext +#!include auth-sql.conf.ext +#!include auth-ldap.conf.ext +#!include auth-passwdfile.conf.ext +#!include auth-checkpassword.conf.ext +#!include auth-static.conf.ext diff --git a/doc/example-config/conf.d/10-director.conf b/doc/example-config/conf.d/10-director.conf new file mode 100644 index 0000000..073d8a8 --- /dev/null +++ b/doc/example-config/conf.d/10-director.conf @@ -0,0 +1,60 @@ +## +## Director-specific settings. +## + +# Director can be used by Dovecot proxy to keep a temporary user -> mail server +# mapping. As long as user has simultaneous connections, the user is always +# redirected to the same server. Each proxy server is running its own director +# process, and the directors are communicating the state to each others. +# Directors are mainly useful with NFS-like setups. + +# List of IPs or hostnames to all director servers, including ourself. +# Ports can be specified as ip:port. The default port is the same as +# what director service's inet_listener is using. +#director_servers = + +# List of IPs or hostnames to all backend mail servers. Ranges are allowed +# too, like 10.0.0.10-10.0.0.30. +#director_mail_servers = + +# How long to redirect users to a specific server after it no longer has +# any connections. +#director_user_expire = 15 min + +# How the username is translated before being hashed. Useful values include +# %Ln if user can log in with or without @domain, %Ld if mailboxes are shared +# within domain. +#director_username_hash = %Lu + +# To enable director service, uncomment the modes and assign a port. +service director { + unix_listener login/director { + #mode = 0666 + } + fifo_listener login/proxy-notify { + #mode = 0666 + } + unix_listener director-userdb { + #mode = 0600 + } + inet_listener { + #port = + } +} + +# Enable director for the wanted login services by telling them to +# connect to director socket instead of the default login socket: +service imap-login { + #executable = imap-login director +} +service pop3-login { + #executable = pop3-login director +} +service submission-login { + #executable = submission-login director +} + +# Enable director for LMTP proxying: +protocol lmtp { + #auth_socket_path = director-userdb +} diff --git a/doc/example-config/conf.d/10-logging.conf b/doc/example-config/conf.d/10-logging.conf new file mode 100644 index 0000000..beb15ba --- /dev/null +++ b/doc/example-config/conf.d/10-logging.conf @@ -0,0 +1,105 @@ +## +## Log destination. +## + +# Log file to use for error messages. "syslog" logs to syslog, +# /dev/stderr logs to stderr. +#log_path = syslog + +# Log file to use for informational messages. Defaults to log_path. +#info_log_path = +# Log file to use for debug messages. Defaults to info_log_path. +#debug_log_path = + +# Syslog facility to use if you're logging to syslog. Usually if you don't +# want to use "mail", you'll use local0..local7. Also other standard +# facilities are supported. +#syslog_facility = mail + +## +## Logging verbosity and debugging. +## + +# Log filter is a space-separated list conditions. If any of the conditions +# match, the log filter matches (i.e. they're ORed together). Parenthesis +# are supported if multiple conditions need to be matched together. +# +# See https://doc.dovecot.org/configuration_manual/event_filter/ for details. +# +# For example: event=http_request_* AND category=error AND category=storage +# +# Filter to specify what debug logging to enable. This will eventually replace +# mail_debug and auth_debug settings. +#log_debug = + +# Crash after logging a matching event. For example category=error will crash +# any time an error is logged, which can be useful for debugging. +#log_core_filter = + +# Log unsuccessful authentication attempts and the reasons why they failed. +#auth_verbose = no + +# In case of password mismatches, log the attempted password. Valid values are +# no, plain and sha1. sha1 can be useful for detecting brute force password +# attempts vs. user simply trying the same password over and over again. +# You can also truncate the value to n chars by appending ":n" (e.g. sha1:6). +#auth_verbose_passwords = no + +# Even more verbose logging for debugging purposes. Shows for example SQL +# queries. +#auth_debug = no + +# In case of password mismatches, log the passwords and used scheme so the +# problem can be debugged. Enabling this also enables auth_debug. +#auth_debug_passwords = no + +# Enable mail process debugging. This can help you figure out why Dovecot +# isn't finding your mails. +#mail_debug = no + +# Show protocol level SSL errors. +#verbose_ssl = no + +# mail_log plugin provides more event logging for mail processes. +plugin { + # Events to log. Also available: flag_change append + #mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename + # Available fields: uid, box, msgid, from, subject, size, vsize, flags + # size and vsize are available only for expunge and copy events. + #mail_log_fields = uid box msgid size +} + +## +## Log formatting. +## + +# Prefix for each line written to log file. % codes are in strftime(3) +# format. +#log_timestamp = "%b %d %H:%M:%S " + +# Space-separated list of elements we want to log. The elements which have +# a non-empty variable value are joined together to form a comma-separated +# string. +#login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c + +# Login log format. %s contains login_log_format_elements string, %$ contains +# the data we want to log. +#login_log_format = %$: %s + +# Log prefix for mail processes. See doc/wiki/Variables.txt for list of +# possible variables you can use. +#mail_log_prefix = "%s(%u)<%{pid}><%{session}>: " + +# Format to use for logging mail deliveries: +# %$ - Delivery status message (e.g. "saved to INBOX") +# %m / %{msgid} - Message-ID +# %s / %{subject} - Subject +# %f / %{from} - From address +# %p / %{size} - Physical size +# %w / %{vsize} - Virtual size +# %e / %{from_envelope} - MAIL FROM envelope +# %{to_envelope} - RCPT TO envelope +# %{delivery_time} - How many milliseconds it took to deliver the mail +# %{session_time} - How long LMTP session took, not including delivery_time +# %{storage_id} - Backend-specific ID for mail, e.g. Maildir filename +#deliver_log_format = msgid=%m: %$ diff --git a/doc/example-config/conf.d/10-mail.conf b/doc/example-config/conf.d/10-mail.conf new file mode 100644 index 0000000..de48f92 --- /dev/null +++ b/doc/example-config/conf.d/10-mail.conf @@ -0,0 +1,415 @@ +## +## Mailbox locations and namespaces +## + +# Location for users' mailboxes. The default is empty, which means that Dovecot +# tries to find the mailboxes automatically. This won't work if the user +# doesn't yet have any mail, so you should explicitly tell Dovecot the full +# location. +# +# If you're using mbox, giving a path to the INBOX file (eg. /var/mail/%u) +# isn't enough. You'll also need to tell Dovecot where the other mailboxes are +# kept. This is called the "root mail directory", and it must be the first +# path given in the mail_location setting. +# +# There are a few special variables you can use, eg.: +# +# %u - username +# %n - user part in user@domain, same as %u if there's no domain +# %d - domain part in user@domain, empty if there's no domain +# %h - home directory +# +# See doc/wiki/Variables.txt for full list. Some examples: +# +# mail_location = maildir:~/Maildir +# mail_location = mbox:~/mail:INBOX=/var/mail/%u +# mail_location = mbox:/var/mail/%d/%1n/%n:INDEX=/var/indexes/%d/%1n/%n +# +# <doc/wiki/MailLocation.txt> +# +#mail_location = + +# If you need to set multiple mailbox locations or want to change default +# namespace settings, you can do it by defining namespace sections. +# +# You can have private, shared and public namespaces. Private namespaces +# are for user's personal mails. Shared namespaces are for accessing other +# users' mailboxes that have been shared. Public namespaces are for shared +# mailboxes that are managed by sysadmin. If you create any shared or public +# namespaces you'll typically want to enable ACL plugin also, otherwise all +# users can access all the shared mailboxes, assuming they have permissions +# on filesystem level to do so. +namespace inbox { + # Namespace type: private, shared or public + #type = private + + # Hierarchy separator to use. You should use the same separator for all + # namespaces or some clients get confused. '/' is usually a good one. + # The default however depends on the underlying mail storage format. + #separator = + + # Prefix required to access this namespace. This needs to be different for + # all namespaces. For example "Public/". + #prefix = + + # Physical location of the mailbox. This is in same format as + # mail_location, which is also the default for it. + #location = + + # There can be only one INBOX, and this setting defines which namespace + # has it. + inbox = yes + + # If namespace is hidden, it's not advertised to clients via NAMESPACE + # extension. You'll most likely also want to set list=no. This is mostly + # useful when converting from another server with different namespaces which + # you want to deprecate but still keep working. For example you can create + # hidden namespaces with prefixes "~/mail/", "~%u/mail/" and "mail/". + #hidden = no + + # Show the mailboxes under this namespace with LIST command. This makes the + # namespace visible for clients that don't support NAMESPACE extension. + # "children" value lists child mailboxes, but hides the namespace prefix. + #list = yes + + # Namespace handles its own subscriptions. If set to "no", the parent + # namespace handles them (empty prefix should always have this as "yes") + #subscriptions = yes + + # See 15-mailboxes.conf for definitions of special mailboxes. +} + +# Example shared namespace configuration +#namespace { + #type = shared + #separator = / + + # Mailboxes are visible under "shared/user@domain/" + # %%n, %%d and %%u are expanded to the destination user. + #prefix = shared/%%u/ + + # Mail location for other users' mailboxes. Note that %variables and ~/ + # expands to the logged in user's data. %%n, %%d, %%u and %%h expand to the + # destination user's data. + #location = maildir:%%h/Maildir:INDEX=~/Maildir/shared/%%u + + # Use the default namespace for saving subscriptions. + #subscriptions = no + + # List the shared/ namespace only if there are visible shared mailboxes. + #list = children +#} +# Should shared INBOX be visible as "shared/user" or "shared/user/INBOX"? +#mail_shared_explicit_inbox = no + +# System user and group used to access mails. If you use multiple, userdb +# can override these by returning uid or gid fields. You can use either numbers +# or names. <doc/wiki/UserIds.txt> +#mail_uid = +#mail_gid = + +# Group to enable temporarily for privileged operations. Currently this is +# used only with INBOX when either its initial creation or dotlocking fails. +# Typically this is set to "mail" to give access to /var/mail. +#mail_privileged_group = + +# Grant access to these supplementary groups for mail processes. Typically +# these are used to set up access to shared mailboxes. Note that it may be +# dangerous to set these if users can create symlinks (e.g. if "mail" group is +# set here, ln -s /var/mail ~/mail/var could allow a user to delete others' +# mailboxes, or ln -s /secret/shared/box ~/mail/mybox would allow reading it). +#mail_access_groups = + +# Allow full filesystem access to clients. There's no access checks other than +# what the operating system does for the active UID/GID. It works with both +# maildir and mboxes, allowing you to prefix mailboxes names with eg. /path/ +# or ~user/. +#mail_full_filesystem_access = no + +# Dictionary for key=value mailbox attributes. This is used for example by +# URLAUTH and METADATA extensions. +#mail_attribute_dict = + +# A comment or note that is associated with the server. This value is +# accessible for authenticated users through the IMAP METADATA server +# entry "/shared/comment". +#mail_server_comment = "" + +# Indicates a method for contacting the server administrator. According to +# RFC 5464, this value MUST be a URI (e.g., a mailto: or tel: URL), but that +# is currently not enforced. Use for example mailto:admin@example.com. This +# value is accessible for authenticated users through the IMAP METADATA server +# entry "/shared/admin". +#mail_server_admin = + +## +## Mail processes +## + +# Don't use mmap() at all. This is required if you store indexes to shared +# filesystems (NFS or clustered filesystem). +#mmap_disable = no + +# Rely on O_EXCL to work when creating dotlock files. NFS supports O_EXCL +# since version 3, so this should be safe to use nowadays by default. +#dotlock_use_excl = yes + +# When to use fsync() or fdatasync() calls: +# optimized (default): Whenever necessary to avoid losing important data +# always: Useful with e.g. NFS when write()s are delayed +# never: Never use it (best performance, but crashes can lose data) +#mail_fsync = optimized + +# Locking method for index files. Alternatives are fcntl, flock and dotlock. +# Dotlocking uses some tricks which may create more disk I/O than other locking +# methods. NFS users: flock doesn't work, remember to change mmap_disable. +#lock_method = fcntl + +# Directory where mails can be temporarily stored. Usually it's used only for +# mails larger than >= 128 kB. It's used by various parts of Dovecot, for +# example LDA/LMTP while delivering large mails or zlib plugin for keeping +# uncompressed mails. +#mail_temp_dir = /tmp + +# Valid UID range for users, defaults to 500 and above. This is mostly +# to make sure that users can't log in as daemons or other system users. +# Note that denying root logins is hardcoded to dovecot binary and can't +# be done even if first_valid_uid is set to 0. +#first_valid_uid = 500 +#last_valid_uid = 0 + +# Valid GID range for users, defaults to non-root/wheel. Users having +# non-valid GID as primary group ID aren't allowed to log in. If user +# belongs to supplementary groups with non-valid GIDs, those groups are +# not set. +#first_valid_gid = 1 +#last_valid_gid = 0 + +# Maximum allowed length for mail keyword name. It's only forced when trying +# to create new keywords. +#mail_max_keyword_length = 50 + +# ':' separated list of directories under which chrooting is allowed for mail +# processes (ie. /var/mail will allow chrooting to /var/mail/foo/bar too). +# This setting doesn't affect login_chroot, mail_chroot or auth chroot +# settings. If this setting is empty, "/./" in home dirs are ignored. +# WARNING: Never add directories here which local users can modify, that +# may lead to root exploit. Usually this should be done only if you don't +# allow shell access for users. <doc/wiki/Chrooting.txt> +#valid_chroot_dirs = + +# Default chroot directory for mail processes. This can be overridden for +# specific users in user database by giving /./ in user's home directory +# (eg. /home/./user chroots into /home). Note that usually there is no real +# need to do chrooting, Dovecot doesn't allow users to access files outside +# their mail directory anyway. If your home directories are prefixed with +# the chroot directory, append "/." to mail_chroot. <doc/wiki/Chrooting.txt> +#mail_chroot = + +# UNIX socket path to master authentication server to find users. +# This is used by imap (for shared users) and lda. +#auth_socket_path = /var/run/dovecot/auth-userdb + +# Directory where to look up mail plugins. +#mail_plugin_dir = /usr/lib/dovecot + +# Space separated list of plugins to load for all services. Plugins specific to +# IMAP, LDA, etc. are added to this list in their own .conf files. +#mail_plugins = + +## +## Mailbox handling optimizations +## + +# Mailbox list indexes can be used to optimize IMAP STATUS commands. They are +# also required for IMAP NOTIFY extension to be enabled. +#mailbox_list_index = yes + +# Trust mailbox list index to be up-to-date. This reduces disk I/O at the cost +# of potentially returning out-of-date results after e.g. server crashes. +# The results will be automatically fixed once the folders are opened. +#mailbox_list_index_very_dirty_syncs = yes + +# Should INBOX be kept up-to-date in the mailbox list index? By default it's +# not, because most of the mailbox accesses will open INBOX anyway. +#mailbox_list_index_include_inbox = no + +# The minimum number of mails in a mailbox before updates are done to cache +# file. This allows optimizing Dovecot's behavior to do less disk writes at +# the cost of more disk reads. +#mail_cache_min_mail_count = 0 + +# When IDLE command is running, mailbox is checked once in a while to see if +# there are any new mails or other changes. This setting defines the minimum +# time to wait between those checks. Dovecot can also use inotify and +# kqueue to find out immediately when changes occur. +#mailbox_idle_check_interval = 30 secs + +# Save mails with CR+LF instead of plain LF. This makes sending those mails +# take less CPU, especially with sendfile() syscall with Linux and FreeBSD. +# But it also creates a bit more disk I/O which may just make it slower. +# Also note that if other software reads the mboxes/maildirs, they may handle +# the extra CRs wrong and cause problems. +#mail_save_crlf = no + +# Max number of mails to keep open and prefetch to memory. This only works with +# some mailbox formats and/or operating systems. +#mail_prefetch_count = 0 + +# How often to scan for stale temporary files and delete them (0 = never). +# These should exist only after Dovecot dies in the middle of saving mails. +#mail_temp_scan_interval = 1w + +# How many slow mail accesses sorting can perform before it returns failure. +# With IMAP the reply is: NO [LIMIT] Requested sort would have taken too long. +# The untagged SORT reply is still returned, but it's likely not correct. +#mail_sort_max_read_count = 0 + +protocol !indexer-worker { + # If folder vsize calculation requires opening more than this many mails from + # disk (i.e. mail sizes aren't in cache already), return failure and finish + # the calculation via indexer process. Disabled by default. This setting must + # be 0 for indexer-worker processes. + #mail_vsize_bg_after_count = 0 +} + +## +## Maildir-specific settings +## + +# By default LIST command returns all entries in maildir beginning with a dot. +# Enabling this option makes Dovecot return only entries which are directories. +# This is done by stat()ing each entry, so it causes more disk I/O. +# (For systems setting struct dirent->d_type, this check is free and it's +# done always regardless of this setting) +#maildir_stat_dirs = no + +# When copying a message, do it with hard links whenever possible. This makes +# the performance much better, and it's unlikely to have any side effects. +#maildir_copy_with_hardlinks = yes + +# Assume Dovecot is the only MUA accessing Maildir: Scan cur/ directory only +# when its mtime changes unexpectedly or when we can't find the mail otherwise. +#maildir_very_dirty_syncs = no + +# If enabled, Dovecot doesn't use the S=<size> in the Maildir filenames for +# getting the mail's physical size, except when recalculating Maildir++ quota. +# This can be useful in systems where a lot of the Maildir filenames have a +# broken size. The performance hit for enabling this is very small. +#maildir_broken_filename_sizes = no + +# Always move mails from new/ directory to cur/, even when the \Recent flags +# aren't being reset. +#maildir_empty_new = no + +## +## mbox-specific settings +## + +# Which locking methods to use for locking mbox. There are four available: +# dotlock: Create <mailbox>.lock file. This is the oldest and most NFS-safe +# solution. If you want to use /var/mail/ like directory, the users +# will need write access to that directory. +# dotlock_try: Same as dotlock, but if it fails because of permissions or +# because there isn't enough disk space, just skip it. +# fcntl : Use this if possible. Works with NFS too if lockd is used. +# flock : May not exist in all systems. Doesn't work with NFS. +# lockf : May not exist in all systems. Doesn't work with NFS. +# +# You can use multiple locking methods; if you do the order they're declared +# in is important to avoid deadlocks if other MTAs/MUAs are using multiple +# locking methods as well. Some operating systems don't allow using some of +# them simultaneously. +#mbox_read_locks = fcntl +#mbox_write_locks = dotlock fcntl + +# Maximum time to wait for lock (all of them) before aborting. +#mbox_lock_timeout = 5 mins + +# If dotlock exists but the mailbox isn't modified in any way, override the +# lock file after this much time. +#mbox_dotlock_change_timeout = 2 mins + +# When mbox changes unexpectedly we have to fully read it to find out what +# changed. If the mbox is large this can take a long time. Since the change +# is usually just a newly appended mail, it'd be faster to simply read the +# new mails. If this setting is enabled, Dovecot does this but still safely +# fallbacks to re-reading the whole mbox file whenever something in mbox isn't +# how it's expected to be. The only real downside to this setting is that if +# some other MUA changes message flags, Dovecot doesn't notice it immediately. +# Note that a full sync is done with SELECT, EXAMINE, EXPUNGE and CHECK +# commands. +#mbox_dirty_syncs = yes + +# Like mbox_dirty_syncs, but don't do full syncs even with SELECT, EXAMINE, +# EXPUNGE or CHECK commands. If this is set, mbox_dirty_syncs is ignored. +#mbox_very_dirty_syncs = no + +# Delay writing mbox headers until doing a full write sync (EXPUNGE and CHECK +# commands and when closing the mailbox). This is especially useful for POP3 +# where clients often delete all mails. The downside is that our changes +# aren't immediately visible to other MUAs. +#mbox_lazy_writes = yes + +# If mbox size is smaller than this (e.g. 100k), don't write index files. +# If an index file already exists it's still read, just not updated. +#mbox_min_index_size = 0 + +# Mail header selection algorithm to use for MD5 POP3 UIDLs when +# pop3_uidl_format=%m. For backwards compatibility we use apop3d inspired +# algorithm, but it fails if the first Received: header isn't unique in all +# mails. An alternative algorithm is "all" that selects all headers. +#mbox_md5 = apop3d + +## +## mdbox-specific settings +## + +# Maximum dbox file size until it's rotated. +#mdbox_rotate_size = 10M + +# Maximum dbox file age until it's rotated. Typically in days. Day begins +# from midnight, so 1d = today, 2d = yesterday, etc. 0 = check disabled. +#mdbox_rotate_interval = 0 + +# When creating new mdbox files, immediately preallocate their size to +# mdbox_rotate_size. This setting currently works only in Linux with some +# filesystems (ext4, xfs). +#mdbox_preallocate_space = no + +## +## Mail attachments +## + +# sdbox and mdbox support saving mail attachments to external files, which +# also allows single instance storage for them. Other backends don't support +# this for now. + +# Directory root where to store mail attachments. Disabled, if empty. +#mail_attachment_dir = + +# Attachments smaller than this aren't saved externally. It's also possible to +# write a plugin to disable saving specific attachments externally. +#mail_attachment_min_size = 128k + +# Filesystem backend to use for saving attachments: +# posix : No SiS done by Dovecot (but this might help FS's own deduplication) +# sis posix : SiS with immediate byte-by-byte comparison during saving +# sis-queue posix : SiS with delayed comparison and deduplication +#mail_attachment_fs = sis posix + +# Hash format to use in attachment filenames. You can add any text and +# variables: %{md4}, %{md5}, %{sha1}, %{sha256}, %{sha512}, %{size}. +# Variables can be truncated, e.g. %{sha256:80} returns only first 80 bits +#mail_attachment_hash = %{sha1} + +# Settings to control adding $HasAttachment or $HasNoAttachment keywords. +# By default, all MIME parts with Content-Disposition=attachment, or inlines +# with filename parameter are consired attachments. +# add-flags - Add the keywords when saving new mails or when fetching can +# do it efficiently. +# content-type=type or !type - Include/exclude content type. Excluding will +# never consider the matched MIME part as attachment. Including will only +# negate an exclusion (e.g. content-type=!foo/* content-type=foo/bar). +# exclude-inlined - Exclude any Content-Disposition=inline MIME part. +#mail_attachment_detection_options = diff --git a/doc/example-config/conf.d/10-master.conf b/doc/example-config/conf.d/10-master.conf new file mode 100644 index 0000000..64fa0f2 --- /dev/null +++ b/doc/example-config/conf.d/10-master.conf @@ -0,0 +1,133 @@ +#default_process_limit = 100 +#default_client_limit = 1000 + +# Default VSZ (virtual memory size) limit for service processes. This is mainly +# intended to catch and kill processes that leak memory before they eat up +# everything. +#default_vsz_limit = 256M + +# Login user is internally used by login processes. This is the most untrusted +# user in Dovecot system. It shouldn't have access to anything at all. +#default_login_user = dovenull + +# Internal user is used by unprivileged processes. It should be separate from +# login user, so that login processes can't disturb other processes. +#default_internal_user = dovecot + +service imap-login { + inet_listener imap { + #port = 143 + } + inet_listener imaps { + #port = 993 + #ssl = yes + } + + # Number of connections to handle before starting a new process. Typically + # the only useful values are 0 (unlimited) or 1. 1 is more secure, but 0 + # is faster. <doc/wiki/LoginProcess.txt> + #service_count = 1 + + # Number of processes to always keep waiting for more connections. + #process_min_avail = 0 + + # If you set service_count=0, you probably need to grow this. + #vsz_limit = $default_vsz_limit +} + +service pop3-login { + inet_listener pop3 { + #port = 110 + } + inet_listener pop3s { + #port = 995 + #ssl = yes + } +} + +service submission-login { + inet_listener submission { + #port = 587 + } + inet_listener submissions { + #port = 465 + } +} + +service lmtp { + unix_listener lmtp { + #mode = 0666 + } + + # Create inet listener only if you can't use the above UNIX socket + #inet_listener lmtp { + # Avoid making LMTP visible for the entire internet + #address = + #port = + #} +} + +service imap { + # Most of the memory goes to mmap()ing files. You may need to increase this + # limit if you have huge mailboxes. + #vsz_limit = $default_vsz_limit + + # Max. number of IMAP processes (connections) + #process_limit = 1024 +} + +service pop3 { + # Max. number of POP3 processes (connections) + #process_limit = 1024 +} + +service submission { + # Max. number of SMTP Submission processes (connections) + #process_limit = 1024 +} + +service auth { + # auth_socket_path points to this userdb socket by default. It's typically + # used by dovecot-lda, doveadm, possibly imap process, etc. Users that have + # full permissions to this socket are able to get a list of all usernames and + # get the results of everyone's userdb lookups. + # + # The default 0666 mode allows anyone to connect to the socket, but the + # userdb lookups will succeed only if the userdb returns an "uid" field that + # matches the caller process's UID. Also if caller's uid or gid matches the + # socket's uid or gid the lookup succeeds. Anything else causes a failure. + # + # To give the caller full permissions to lookup all users, set the mode to + # something else than 0666 and Dovecot lets the kernel enforce the + # permissions (e.g. 0777 allows everyone full permissions). + unix_listener auth-userdb { + #mode = 0666 + #user = + #group = + } + + # Postfix smtp-auth + #unix_listener /var/spool/postfix/private/auth { + # mode = 0666 + #} + + # Auth process is run as this user. + #user = $default_internal_user +} + +service auth-worker { + # Auth worker process is run as root by default, so that it can access + # /etc/shadow. If this isn't necessary, the user should be changed to + # $default_internal_user. + #user = root +} + +service dict { + # If dict proxy is used, mail processes should have access to its socket. + # For example: mode=0660, group=vmail and global mail_access_groups=vmail + unix_listener dict { + #mode = 0600 + #user = + #group = + } +} diff --git a/doc/example-config/conf.d/10-metrics.conf b/doc/example-config/conf.d/10-metrics.conf new file mode 100644 index 0000000..f7a758f --- /dev/null +++ b/doc/example-config/conf.d/10-metrics.conf @@ -0,0 +1,74 @@ +## +## Statistics and metrics +## + +# Dovecot supports gathering statistics from events. +# Currently there are no statistics logged by default, and therefore they must +# be explicitly added using the metric configuration blocks. +# +# Unlike old stats, the new statistics do not require any plugins loaded. +# +# See https://doc.dovecot.org/configuration_manual/stats/ for more details. + +## +## Example metrics +## + +#metric auth_success { +# filter = event=auth_request_finished AND success=yes +#} +# +#metric auth_failures { +# filter = event=auth_request_finished AND NOT success=yes +#} +# +#metric imap_command { +# filter = event=imap_command_finished +# group_by = cmd_name tagged_reply_state +#} +# +#metric smtp_command { +# filter = event=smtp_server_command_finished +# group_by = cmd_name status_code duration:exponential:1:5:10 +#} +# +#metric mail_delivery { +# filter = event=mail_delivery_finished +# group_by = duration:exponential:1:5:10 +#} + +## +## Prometheus +## + +# To allow access to statistics with Prometheus, enable http listener +# on stats process. Stats will be available on /metrics path. +# +# See https://doc.dovecot.org/configuration_manual/stats/openmetrics/ for more +# details. + +#service stats { +# inet_listener http { +# port = 9900 +# } +#} + +## +## Event exporting +## + +# You can also export individual events. +# +# See https://doc.dovecot.org/configuration_manual/event_export/ for more +# details. + +#event_exporter log { +# format = json +# format_args = time-rfc3339 +# transport = log +#} +# +#metric imap_commands { +# exporter = log +# filter = event=imap_command_finished +#} diff --git a/doc/example-config/conf.d/10-ssl.conf b/doc/example-config/conf.d/10-ssl.conf new file mode 100644 index 0000000..ad84766 --- /dev/null +++ b/doc/example-config/conf.d/10-ssl.conf @@ -0,0 +1,82 @@ +## +## SSL settings +## + +# SSL/TLS support: yes, no, required. <doc/wiki/SSL.txt> +#ssl = yes + +# PEM encoded X.509 SSL/TLS certificate and private key. They're opened before +# dropping root privileges, so keep the key file unreadable by anyone but +# root. Included doc/mkcert.sh can be used to easily generate self-signed +# certificate, just make sure to update the domains in dovecot-openssl.cnf +ssl_cert = </etc/ssl/certs/dovecot.pem +ssl_key = </etc/ssl/private/dovecot.pem + +# If key file is password protected, give the password here. Alternatively +# give it when starting dovecot with -p parameter. Since this file is often +# world-readable, you may want to place this setting instead to a different +# root owned 0600 file by using ssl_key_password = <path. +#ssl_key_password = + +# PEM encoded trusted certificate authority. Set this only if you intend to use +# ssl_verify_client_cert=yes. The file should contain the CA certificate(s) +# followed by the matching CRL(s). (e.g. ssl_ca = </etc/ssl/certs/ca.pem) +#ssl_ca = + +# Require that CRL check succeeds for client certificates. +#ssl_require_crl = yes + +# Directory and/or file for trusted SSL CA certificates. These are used only +# when Dovecot needs to act as an SSL client (e.g. imapc backend or +# submission service). The directory is usually /etc/ssl/certs in +# Debian-based systems and the file is /etc/pki/tls/cert.pem in +# RedHat-based systems. Note that ssl_client_ca_file isn't recommended with +# large CA bundles, because it leads to excessive memory usage. +#ssl_client_ca_dir = +#ssl_client_ca_file = + +# Require valid cert when connecting to a remote server +#ssl_client_require_valid_cert = yes + +# Request client to send a certificate. If you also want to require it, set +# auth_ssl_require_client_cert=yes in auth section. +#ssl_verify_client_cert = no + +# Which field from certificate to use for username. commonName and +# x500UniqueIdentifier are the usual choices. You'll also need to set +# auth_ssl_username_from_cert=yes. +#ssl_cert_username_field = commonName + +# SSL DH parameters +# Generate new params with `openssl dhparam -out /etc/dovecot/dh.pem 4096` +# Or migrate from old ssl-parameters.dat file with the command dovecot +# gives on startup when ssl_dh is unset. +#ssl_dh = </etc/dovecot/dh.pem + +# Minimum SSL protocol version to use. Potentially recognized values are SSLv3, +# TLSv1, TLSv1.1, TLSv1.2 and TLSv1.3, depending on the OpenSSL version used. +# +# Dovecot also recognizes values ANY and LATEST. ANY matches with any protocol +# version, and LATEST matches with the latest version supported by library. +#ssl_min_protocol = TLSv1.2 + +# SSL ciphers to use, the default is: +#ssl_cipher_list = ALL:!kRSA:!SRP:!kDHd:!DSS:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!MD5:!PSK:!RC4:!ADH:!LOW@STRENGTH +# To disable non-EC DH, use: +#ssl_cipher_list = ALL:!DH:!kRSA:!SRP:!kDHd:!DSS:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!MD5:!PSK:!RC4:!ADH:!LOW@STRENGTH + +# Colon separated list of elliptic curves to use. Empty value (the default) +# means use the defaults from the SSL library. P-521:P-384:P-256 would be an +# example of a valid value. +#ssl_curve_list = + +# Prefer the server's order of ciphers over client's. +#ssl_prefer_server_ciphers = no + +# SSL crypto device to use, for valid values run "openssl engine" +#ssl_crypto_device = + +# SSL extra options. Currently supported options are: +# compression - Enable compression. +# no_ticket - Disable SSL session tickets. +#ssl_options = diff --git a/doc/example-config/conf.d/15-lda.conf b/doc/example-config/conf.d/15-lda.conf new file mode 100644 index 0000000..e1d6fcd --- /dev/null +++ b/doc/example-config/conf.d/15-lda.conf @@ -0,0 +1,48 @@ +## +## LDA specific settings (also used by LMTP) +## + +# Address to use when sending rejection mails. +# Default is postmaster@%d. %d expands to recipient domain. +#postmaster_address = + +# Hostname to use in various parts of sent mails (e.g. in Message-Id) and +# in LMTP replies. Default is the system's real hostname@domain. +#hostname = + +# If user is over quota, return with temporary failure instead of +# bouncing the mail. +#quota_full_tempfail = no + +# Binary to use for sending mails. +#sendmail_path = /usr/sbin/sendmail + +# If non-empty, send mails via this SMTP host[:port] instead of sendmail. +#submission_host = + +# Subject: header to use for rejection mails. You can use the same variables +# as for rejection_reason below. +#rejection_subject = Rejected: %s + +# Human readable error message for rejection mails. You can use variables: +# %n = CRLF, %r = reason, %s = original subject, %t = recipient +#rejection_reason = Your message to <%t> was automatically rejected:%n%r + +# Delimiter character between local-part and detail in email address. +#recipient_delimiter = + + +# Header where the original recipient address (SMTP's RCPT TO: address) is taken +# from if not available elsewhere. With dovecot-lda -a parameter overrides this. +# A commonly used header for this is X-Original-To. +#lda_original_recipient_header = + +# Should saving a mail to a nonexistent mailbox automatically create it? +#lda_mailbox_autocreate = no + +# Should automatically created mailboxes be also automatically subscribed? +#lda_mailbox_autosubscribe = no + +protocol lda { + # Space separated list of plugins to load (default is global mail_plugins). + #mail_plugins = $mail_plugins +} diff --git a/doc/example-config/conf.d/15-mailboxes.conf b/doc/example-config/conf.d/15-mailboxes.conf new file mode 100644 index 0000000..71076d4 --- /dev/null +++ b/doc/example-config/conf.d/15-mailboxes.conf @@ -0,0 +1,86 @@ +## +## Mailbox definitions +## + +# Each mailbox is specified in a separate mailbox section. The section name +# specifies the mailbox name. If it has spaces, you can put the name +# "in quotes". These sections can contain the following mailbox settings: +# +# auto: +# Indicates whether the mailbox with this name is automatically created +# implicitly when it is first accessed. The user can also be automatically +# subscribed to the mailbox after creation. The following values are +# defined for this setting: +# +# no - Never created automatically. +# create - Automatically created, but no automatic subscription. +# subscribe - Automatically created and subscribed. +# +# special_use: +# A space-separated list of SPECIAL-USE flags (RFC 6154) to use for the +# mailbox. There are no validity checks, so you could specify anything +# you want in here, but it's not a good idea to use flags other than the +# standard ones specified in the RFC: +# +# \All - This (virtual) mailbox presents all messages in the +# user's message store. +# \Archive - This mailbox is used to archive messages. +# \Drafts - This mailbox is used to hold draft messages. +# \Flagged - This (virtual) mailbox presents all messages in the +# user's message store marked with the IMAP \Flagged flag. +# \Important - This (virtual) mailbox presents all messages in the +# user's message store deemed important to user. +# \Junk - This mailbox is where messages deemed to be junk mail +# are held. +# \Sent - This mailbox is used to hold copies of messages that +# have been sent. +# \Trash - This mailbox is used to hold messages that have been +# deleted. +# +# comment: +# Defines a default comment or note associated with the mailbox. This +# value is accessible through the IMAP METADATA mailbox entries +# "/shared/comment" and "/private/comment". Users with sufficient +# privileges can override the default value for entries with a custom +# value. + +# NOTE: Assumes "namespace inbox" has been defined in 10-mail.conf. +namespace inbox { + # These mailboxes are widely used and could perhaps be created automatically: + mailbox Drafts { + special_use = \Drafts + } + mailbox Junk { + special_use = \Junk + } + mailbox Trash { + special_use = \Trash + } + + # For \Sent mailboxes there are two widely used names. We'll mark both of + # them as \Sent. User typically deletes one of them if duplicates are created. + mailbox Sent { + special_use = \Sent + } + mailbox "Sent Messages" { + special_use = \Sent + } + + # If you have a virtual "All messages" mailbox: + #mailbox virtual/All { + # special_use = \All + # comment = All my messages + #} + + # If you have a virtual "Flagged" mailbox: + #mailbox virtual/Flagged { + # special_use = \Flagged + # comment = All my flagged messages + #} + + # If you have a virtual "Important" mailbox: + #mailbox virtual/Important { + # special_use = \Important + # comment = All my important messages + #} +} diff --git a/doc/example-config/conf.d/20-imap.conf b/doc/example-config/conf.d/20-imap.conf new file mode 100644 index 0000000..e60b0cd --- /dev/null +++ b/doc/example-config/conf.d/20-imap.conf @@ -0,0 +1,99 @@ +## +## IMAP specific settings +## + +# If nothing happens for this long while client is IDLEing, move the connection +# to imap-hibernate process and close the old imap process. This saves memory, +# because connections use very little memory in imap-hibernate process. The +# downside is that recreating the imap process back uses some resources. +#imap_hibernate_timeout = 0 + +# Maximum IMAP command line length. Some clients generate very long command +# lines with huge mailboxes, so you may need to raise this if you get +# "Too long argument" or "IMAP command line too large" errors often. +#imap_max_line_length = 64k + +# IMAP logout format string: +# %i - total number of bytes read from client +# %o - total number of bytes sent to client +# %{fetch_hdr_count} - Number of mails with mail header data sent to client +# %{fetch_hdr_bytes} - Number of bytes with mail header data sent to client +# %{fetch_body_count} - Number of mails with mail body data sent to client +# %{fetch_body_bytes} - Number of bytes with mail body data sent to client +# %{deleted} - Number of mails where client added \Deleted flag +# %{expunged} - Number of mails that client expunged, which does not +# include automatically expunged mails +# %{autoexpunged} - Number of mails that were automatically expunged after +# client disconnected +# %{trashed} - Number of mails that client copied/moved to the +# special_use=\Trash mailbox. +# %{appended} - Number of mails saved during the session +#imap_logout_format = in=%i out=%o deleted=%{deleted} expunged=%{expunged} \ +# trashed=%{trashed} hdr_count=%{fetch_hdr_count} \ +# hdr_bytes=%{fetch_hdr_bytes} body_count=%{fetch_body_count} \ +# body_bytes=%{fetch_body_bytes} + +# Override the IMAP CAPABILITY response. If the value begins with '+', +# add the given capabilities on top of the defaults (e.g. +XFOO XBAR). +#imap_capability = + +# How long to wait between "OK Still here" notifications when client is +# IDLEing. +#imap_idle_notify_interval = 2 mins + +# ID field names and values to send to clients. Using * as the value makes +# Dovecot use the default value. The following fields have default values +# currently: name, version, os, os-version, support-url, support-email, +# revision. +#imap_id_send = + +# ID fields sent by client to log. * means everything. +#imap_id_log = + +# Workarounds for various client bugs: +# delay-newmail: +# Send EXISTS/RECENT new mail notifications only when replying to NOOP +# and CHECK commands. Some clients ignore them otherwise, for example OSX +# Mail (<v2.1). Outlook Express breaks more badly though, without this it +# may show user "Message no longer in server" errors. Note that OE6 still +# breaks even with this workaround if synchronization is set to +# "Headers Only". +# tb-extra-mailbox-sep: +# Thunderbird gets somehow confused with LAYOUT=fs (mbox and dbox) and +# adds extra '/' suffixes to mailbox names. This option causes Dovecot to +# ignore the extra '/' instead of treating it as invalid mailbox name. +# tb-lsub-flags: +# Show \Noselect flags for LSUB replies with LAYOUT=fs (e.g. mbox). +# This makes Thunderbird realize they aren't selectable and show them +# greyed out, instead of only later giving "not selectable" popup error. +# +# The list is space-separated. +#imap_client_workarounds = + +# Host allowed in URLAUTH URLs sent by client. "*" allows all. +#imap_urlauth_host = + +# Enable IMAP LITERAL- extension (replaces LITERAL+) +#imap_literal_minus = no + +# What happens when FETCH fails due to some internal error: +# disconnect-immediately: +# The FETCH is aborted immediately and the IMAP client is disconnected. +# disconnect-after: +# The FETCH runs for all the requested mails returning as much data as +# possible. The client is finally disconnected without a tagged reply. +# no-after: +# Same as disconnect-after, but tagged NO reply is sent instead of +# disconnecting the client. If the client attempts to FETCH the same failed +# mail more than once, the client is disconnected. This is to avoid clients +# from going into infinite loops trying to FETCH a broken mail. +#imap_fetch_failure = disconnect-immediately + +protocol imap { + # Space separated list of plugins to load (default is global mail_plugins). + #mail_plugins = $mail_plugins + + # Maximum number of IMAP connections allowed for a user from each IP address. + # NOTE: The username is compared case-sensitively. + #mail_max_userip_connections = 10 +} diff --git a/doc/example-config/conf.d/20-lmtp.conf b/doc/example-config/conf.d/20-lmtp.conf new file mode 100644 index 0000000..0684e81 --- /dev/null +++ b/doc/example-config/conf.d/20-lmtp.conf @@ -0,0 +1,40 @@ +## +## LMTP specific settings +## + +# Support proxying to other LMTP/SMTP servers by performing passdb lookups. +#lmtp_proxy = no + +# When recipient address includes the detail (e.g. user+detail), try to save +# the mail to the detail mailbox. See also recipient_delimiter and +# lda_mailbox_autocreate settings. +#lmtp_save_to_detail_mailbox = no + +# Verify quota before replying to RCPT TO. This adds a small overhead. +#lmtp_rcpt_check_quota = no + +# Add "Received:" header to mails delivered. +#lmtp_add_received_header = yes + +# Which recipient address to use for Delivered-To: header and Received: +# header. The default is "final", which is the same as the one given to +# RCPT TO command. "original" uses the address given in RCPT TO's ORCPT +# parameter, "none" uses nothing. Note that "none" is currently always used +# when a mail has multiple recipients. +#lmtp_hdr_delivery_address = final + +# Workarounds for various client bugs: +# whitespace-before-path: +# Allow one or more spaces or tabs between `MAIL FROM:' and path and between +# `RCPT TO:' and path. +# mailbox-for-path: +# Allow using bare Mailbox syntax (i.e., without <...>) instead of full path +# syntax. +# +# The list is space-separated. +#lmtp_client_workarounds = + +protocol lmtp { + # Space separated list of plugins to load (default is global mail_plugins). + #mail_plugins = $mail_plugins +} diff --git a/doc/example-config/conf.d/20-pop3.conf b/doc/example-config/conf.d/20-pop3.conf new file mode 100644 index 0000000..7b310ea --- /dev/null +++ b/doc/example-config/conf.d/20-pop3.conf @@ -0,0 +1,99 @@ +## +## POP3 specific settings +## + +# Don't try to set mails non-recent or seen with POP3 sessions. This is +# mostly intended to reduce disk I/O. With maildir it doesn't move files +# from new/ to cur/, with mbox it doesn't write Status-header. +#pop3_no_flag_updates = no + +# Support LAST command which exists in old POP3 specs, but has been removed +# from new ones. Some clients still wish to use this though. Enabling this +# makes RSET command clear all \Seen flags from messages. +#pop3_enable_last = no + +# If mail has X-UIDL header, use it as the mail's UIDL. +#pop3_reuse_xuidl = no + +# Allow only one POP3 session to run simultaneously for the same user. +#pop3_lock_session = no + +# POP3 requires message sizes to be listed as if they had CR+LF linefeeds. +# Many POP3 servers violate this by returning the sizes with LF linefeeds, +# because it's faster to get. When this setting is enabled, Dovecot still +# tries to do the right thing first, but if that requires opening the +# message, it fallbacks to the easier (but incorrect) size. +#pop3_fast_size_lookups = no + +# POP3 UIDL (unique mail identifier) format to use. You can use following +# variables, along with the variable modifiers described in +# doc/wiki/Variables.txt (e.g. %Uf for the filename in uppercase) +# +# %v - Mailbox's IMAP UIDVALIDITY +# %u - Mail's IMAP UID +# %m - MD5 sum of the mailbox headers in hex (mbox only) +# %f - filename (maildir only) +# %g - Mail's GUID +# +# If you want UIDL compatibility with other POP3 servers, use: +# UW's ipop3d : %08Xv%08Xu +# Courier : %f or %v-%u (both might be used simultaneously) +# Cyrus (<= 2.1.3) : %u +# Cyrus (>= 2.1.4) : %v.%u +# Dovecot v0.99.x : %v.%u +# tpop3d : %Mf +# +# Note that Outlook 2003 seems to have problems with %v.%u format which was +# Dovecot's default, so if you're building a new server it would be a good +# idea to change this. %08Xu%08Xv should be pretty fail-safe. +# +#pop3_uidl_format = %08Xu%08Xv + +# Permanently save UIDLs sent to POP3 clients, so pop3_uidl_format changes +# won't change those UIDLs. Currently this works only with Maildir. +#pop3_save_uidl = no + +# What to do about duplicate UIDLs if they exist? +# allow: Show duplicates to clients. +# rename: Append a temporary -2, -3, etc. counter after the UIDL. +#pop3_uidl_duplicates = allow + +# This option changes POP3 behavior so that it's not possible to actually +# delete mails via POP3, only hide them from future POP3 sessions. The mails +# will still be counted towards user's quota until actually deleted via IMAP. +# Use e.g. "$POP3Deleted" as the value (it will be visible as IMAP keyword). +# Make sure you can legally archive mails before enabling this setting. +#pop3_deleted_flag = + +# POP3 logout format string: +# %i - total number of bytes read from client +# %o - total number of bytes sent to client +# %t - number of TOP commands +# %p - number of bytes sent to client as a result of TOP command +# %r - number of RETR commands +# %b - number of bytes sent to client as a result of RETR command +# %d - number of deleted messages +# %{deleted_bytes} - number of bytes in deleted messages +# %m - number of messages (before deletion) +# %s - mailbox size in bytes (before deletion) +# %u - old/new UIDL hash. may help finding out if UIDLs changed unexpectedly +#pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s + +# Workarounds for various client bugs: +# outlook-no-nuls: +# Outlook and Outlook Express hang if mails contain NUL characters. +# This setting replaces them with 0x80 character. +# oe-ns-eoh: +# Outlook Express and Netscape Mail breaks if end of headers-line is +# missing. This option simply sends it if it's missing. +# The list is space-separated. +#pop3_client_workarounds = + +protocol pop3 { + # Space separated list of plugins to load (default is global mail_plugins). + #mail_plugins = $mail_plugins + + # Maximum number of POP3 connections allowed for a user from each IP address. + # NOTE: The username is compared case-sensitively. + #mail_max_userip_connections = 10 +} diff --git a/doc/example-config/conf.d/20-submission.conf b/doc/example-config/conf.d/20-submission.conf new file mode 100644 index 0000000..390089c --- /dev/null +++ b/doc/example-config/conf.d/20-submission.conf @@ -0,0 +1,112 @@ +## +## Settings specific to SMTP Submission +## + +# SMTP Submission logout format string: +# %i - total number of bytes read from client +# %o - total number of bytes sent to client +# %{command_count} - Number of commands received from client +# %{reply_count} - Number of replies sent to client +# %{session} - Session ID of the login session +# %{transaction_id} - ID of the current transaction, if any +#submission_logout_format = in=%i out=%o + +# Host name reported by the SMTP service, for example to the client in the +# initial greeting and to the relay server in the HELO/EHLO command. +# Default is the system's real hostname@domain. +#hostname = + +# Maximum size of messages accepted for relay. This announced in the SIZE +# capability. If not configured, this is either determined from the relay +# server or left unlimited if no limit is known (relay will reply with error +# if some unknown limit exists there, which is duly passed to our client). +#submission_max_mail_size = + +# Maximum number of recipients accepted per connection (default: unlimited) +#submission_max_recipients = + +# Workarounds for various client bugs: +# whitespace-before-path: +# Allow one or more spaces or tabs between `MAIL FROM:' and path and between +# `RCPT TO:' and path. +# mailbox-for-path: +# Allow using bare Mailbox syntax (i.e., without <...>) instead of full path +# syntax. +# +# The list is space-separated. +#submission_client_workarounds = + +# Relay server configuration: +# +# The Dovecot SMTP submission service directly proxies the mail transaction +# to the SMTP relay configured here. + +# Host name for the relay server (required) +#submission_relay_host = + +# Port for the relay server +#submission_relay_port = 25 + +# Is the relay server trusted? This determines whether we try to send +# (Postfix-specific) XCLIENT data to the relay server +#submission_relay_trusted = no + +# Authentication data for the relay server if authentication is required +#submission_relay_user = +#submission_relay_master_user = +#submission_relay_password = + +# SSL configuration for connection to relay server +# +# submission_relay_ssl: +# Indicates whether SSL is used for the connection to the relay server. The +# following values are defined for this setting: +# +# no - No SSL is used +# smtps - An SMTPS connection (immediate SSL) is used +# starttls - The STARTTLS command is used to establish SSL layer +#submission_relay_ssl = no + +# submission_relay_ssl_verify: +# Configures whether the SSL certificate of the relay server is to be +# verified. +#submission_relay_ssl_verify = yes + +# Write protocol logs for relay connection to this directory for debugging +#submission_relay_rawlog_dir = + +# BURL is configured implicitly by IMAP URLAUTH + +# Part of the SMTP capabilities that the submission service can offer to the +# client (as listed in the EHLO reply) depend on those capabilities also being +# provided by the relay server. These capabilities currently are: +# +# - 8BITMIME +# - BINARYMIME +# - DSN +# - VRFY (always returns 252 without support) +# +# By default, the submission service first connects to the relay server to +# determine the support for such capabilities before sending the initial EHLO +# reply to the client. If the list of capabilities returned by the relay server +# is somehow unreliable or it is undesirable to start the connection to the +# relay server before the first mail transaction is started, the backend +# capabilities can be configured explicitly using the +# submission_backend_capabilities setting. This is a space-separated list of +# SMTP capability names. This setting is only relevant for capabilities that +# depend on support from the relay server: including (or omitting) capabilities +# that are not listed above has no effect. When this setting is explicitly set +# to the empty string, none of the capabilities is enabled. To achieve the +# default behavior, this setting must be left unconfigured. +#submission_backend_capabilities = + +protocol submission { + # Space-separated list of plugins to load (default is global mail_plugins). + #mail_plugins = $mail_plugins + + # Maximum number of SMTP submission connections allowed for a user from + # each IP address. + # NOTE: The username is compared case-sensitively. + #mail_max_userip_connections = 10 +} + diff --git a/doc/example-config/conf.d/90-acl.conf b/doc/example-config/conf.d/90-acl.conf new file mode 100644 index 0000000..f0c0e7a --- /dev/null +++ b/doc/example-config/conf.d/90-acl.conf @@ -0,0 +1,19 @@ +## +## Mailbox access control lists. +## + +# vfile backend reads ACLs from "dovecot-acl" file from mail directory. +# You can also optionally give a global ACL directory path where ACLs are +# applied to all users' mailboxes. The global ACL directory contains +# one file for each mailbox, eg. INBOX or sub.mailbox. cache_secs parameter +# specifies how many seconds to wait between stat()ing dovecot-acl file +# to see if it changed. +plugin { + #acl = vfile:/etc/dovecot/global-acls:cache_secs=300 +} + +# To let users LIST mailboxes shared by other users, Dovecot needs a +# shared mailbox dictionary. For example: +plugin { + #acl_shared_dict = file:/var/lib/dovecot/shared-mailboxes +} diff --git a/doc/example-config/conf.d/90-plugin.conf b/doc/example-config/conf.d/90-plugin.conf new file mode 100644 index 0000000..8c8fccf --- /dev/null +++ b/doc/example-config/conf.d/90-plugin.conf @@ -0,0 +1,11 @@ +## +## Plugin settings +## + +# All wanted plugins must be listed in mail_plugins setting before any of the +# settings take effect. See <doc/wiki/Plugins.txt> for list of plugins and +# their configuration. Note that %variable expansion is done for all values. + +plugin { + #setting_name = value +} diff --git a/doc/example-config/conf.d/90-quota.conf b/doc/example-config/conf.d/90-quota.conf new file mode 100644 index 0000000..3308c05 --- /dev/null +++ b/doc/example-config/conf.d/90-quota.conf @@ -0,0 +1,83 @@ +## +## Quota configuration. +## + +# Note that you also have to enable quota plugin in mail_plugins setting. +# <doc/wiki/Quota.txt> + +## +## Quota limits +## + +# Quota limits are set using "quota_rule" parameters. To get per-user quota +# limits, you can set/override them by returning "quota_rule" extra field +# from userdb. It's also possible to give mailbox-specific limits, for example +# to give additional 100 MB when saving to Trash: + +plugin { + #quota_rule = *:storage=1G + #quota_rule2 = Trash:storage=+100M + + # LDA/LMTP allows saving the last mail to bring user from under quota to + # over quota, if the quota doesn't grow too high. Default is to allow as + # long as quota will stay under 10% above the limit. Also allowed e.g. 10M. + #quota_grace = 10%% + + # Quota plugin can also limit the maximum accepted mail size. + #quota_max_mail_size = 100M +} + +## +## Quota warnings +## + +# You can execute a given command when user exceeds a specified quota limit. +# Each quota root has separate limits. Only the command for the first +# exceeded limit is executed, so put the highest limit first. +# The commands are executed via script service by connecting to the named +# UNIX socket (quota-warning below). +# Note that % needs to be escaped as %%, otherwise "% " expands to empty. + +plugin { + #quota_warning = storage=95%% quota-warning 95 %u + #quota_warning2 = storage=80%% quota-warning 80 %u +} + +# Example quota-warning service. The unix listener's permissions should be +# set in a way that mail processes can connect to it. Below example assumes +# that mail processes run as vmail user. If you use mode=0666, all system users +# can generate quota warnings to anyone. +#service quota-warning { +# executable = script /usr/local/bin/quota-warning.sh +# user = dovecot +# unix_listener quota-warning { +# user = vmail +# } +#} + +## +## Quota backends +## + +# Multiple backends are supported: +# dirsize: Find and sum all the files found from mail directory. +# Extremely SLOW with Maildir. It'll eat your CPU and disk I/O. +# dict: Keep quota stored in dictionary (eg. SQL) +# maildir: Maildir++ quota +# fs: Read-only support for filesystem quota + +plugin { + #quota = dirsize:User quota + #quota = maildir:User quota + #quota = dict:User quota::proxy::quota + #quota = fs:User quota +} + +# Multiple quota roots are also possible, for example this gives each user +# their own 100MB quota and one shared 1GB quota within the domain: +plugin { + #quota = dict:user::proxy::quota + #quota2 = dict:domain:%d:proxy::quota_domain + #quota_rule = *:storage=102400 + #quota2_rule = *:storage=1048576 +} diff --git a/doc/example-config/conf.d/Makefile.am b/doc/example-config/conf.d/Makefile.am new file mode 100644 index 0000000..1950fd5 --- /dev/null +++ b/doc/example-config/conf.d/Makefile.am @@ -0,0 +1,32 @@ +pkgsysconfdir = $(sysconfdir)/dovecot + +exampledir = $(docdir)/example-config/conf.d +example_DATA = \ + auth-checkpassword.conf.ext \ + auth-deny.conf.ext \ + auth-dict.conf.ext \ + auth-ldap.conf.ext \ + auth-master.conf.ext \ + auth-passwdfile.conf.ext \ 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Included from 10-auth.conf. +# +# <doc/wiki/AuthDatabase.CheckPassword.txt> + +passdb { + driver = checkpassword + args = /usr/bin/checkpassword +} + +# passdb lookup should return also userdb info +userdb { + driver = prefetch +} + +# Standard checkpassword doesn't support direct userdb lookups. +# If you need checkpassword userdb, the checkpassword must support +# Dovecot-specific extensions. +#userdb { +# driver = checkpassword +# args = /usr/bin/checkpassword +#} diff --git a/doc/example-config/conf.d/auth-deny.conf.ext b/doc/example-config/conf.d/auth-deny.conf.ext new file mode 100644 index 0000000..ce3f1cf --- /dev/null +++ b/doc/example-config/conf.d/auth-deny.conf.ext @@ -0,0 +1,15 @@ +# Deny access for users. Included from 10-auth.conf. + +# Users can be (temporarily) disabled by adding a passdb with deny=yes. +# If the user is found from that database, authentication will fail. +# The deny passdb should always be specified before others, so it gets +# checked first. + +# Example deny passdb using passwd-file. You can use any passdb though. +passdb { + driver = passwd-file + deny = yes + + # File contains a list of usernames, one per line + args = /etc/dovecot/deny-users +} diff --git a/doc/example-config/conf.d/auth-dict.conf.ext b/doc/example-config/conf.d/auth-dict.conf.ext new file mode 100644 index 0000000..0be4847 --- /dev/null +++ b/doc/example-config/conf.d/auth-dict.conf.ext @@ -0,0 +1,16 @@ +# Authentication via dict backend. Included from 10-auth.conf. +# +# <doc/wiki/AuthDatabase.Dict.txt> + +passdb { + driver = dict + + # Path for dict configuration file, see + # example-config/dovecot-dict-auth.conf.ext + args = /etc/dovecot/dovecot-dict-auth.conf.ext +} + +userdb { + driver = dict + args = /etc/dovecot/dovecot-dict-auth.conf.ext +} diff --git a/doc/example-config/conf.d/auth-ldap.conf.ext b/doc/example-config/conf.d/auth-ldap.conf.ext new file mode 100644 index 0000000..5db32fa --- /dev/null +++ b/doc/example-config/conf.d/auth-ldap.conf.ext @@ -0,0 +1,33 @@ +# Authentication for LDAP users. Included from 10-auth.conf. +# +# <doc/wiki/AuthDatabase.LDAP.txt> + +passdb { + driver = ldap + + # Path for LDAP configuration file, see example-config/dovecot-ldap.conf.ext + args = /etc/dovecot/dovecot-ldap.conf.ext +} + +# "prefetch" user database means that the passdb already provided the +# needed information and there's no need to do a separate userdb lookup. +# <doc/wiki/UserDatabase.Prefetch.txt> +#userdb { +# driver = prefetch +#} + +userdb { + driver = ldap + args = /etc/dovecot/dovecot-ldap.conf.ext + + # Default fields can be used to specify defaults that LDAP may override + #default_fields = home=/home/virtual/%u +} + +# If you don't have any user-specific settings, you can avoid the userdb LDAP +# lookup by using userdb static instead of userdb ldap, for example: +# <doc/wiki/UserDatabase.Static.txt> +#userdb { + #driver = static + #args = uid=vmail gid=vmail home=/var/vmail/%u +#} diff --git a/doc/example-config/conf.d/auth-master.conf.ext b/doc/example-config/conf.d/auth-master.conf.ext new file mode 100644 index 0000000..2cf128f --- /dev/null +++ b/doc/example-config/conf.d/auth-master.conf.ext @@ -0,0 +1,16 @@ +# Authentication for master users. Included from 10-auth.conf. + +# By adding master=yes setting inside a passdb you make the passdb a list +# of "master users", who can log in as anyone else. +# <doc/wiki/Authentication.MasterUsers.txt> + +# Example master user passdb using passwd-file. You can use any passdb though. +passdb { + driver = passwd-file + master = yes + args = /etc/dovecot/master-users + + # Unless you're using PAM, you probably still want the destination user to + # be looked up from passdb that it really exists. pass=yes does that. + pass = yes +} diff --git a/doc/example-config/conf.d/auth-passwdfile.conf.ext b/doc/example-config/conf.d/auth-passwdfile.conf.ext new file mode 100644 index 0000000..c89d28c --- /dev/null +++ b/doc/example-config/conf.d/auth-passwdfile.conf.ext @@ -0,0 +1,20 @@ +# Authentication for passwd-file users. Included from 10-auth.conf. +# +# passwd-like file with specified location. +# <doc/wiki/AuthDatabase.PasswdFile.txt> + +passdb { + driver = passwd-file + args = scheme=CRYPT username_format=%u /etc/dovecot/users +} + +userdb { + driver = passwd-file + args = username_format=%u /etc/dovecot/users + + # Default fields that can be overridden by passwd-file + #default_fields = quota_rule=*:storage=1G + + # Override fields from passwd-file + #override_fields = home=/home/virtual/%u +} diff --git a/doc/example-config/conf.d/auth-sql.conf.ext b/doc/example-config/conf.d/auth-sql.conf.ext new file mode 100644 index 0000000..ccbea86 --- /dev/null +++ b/doc/example-config/conf.d/auth-sql.conf.ext @@ -0,0 +1,30 @@ +# Authentication for SQL users. Included from 10-auth.conf. +# +# <doc/wiki/AuthDatabase.SQL.txt> + +passdb { + driver = sql + + # Path for SQL configuration file, see example-config/dovecot-sql.conf.ext + args = /etc/dovecot/dovecot-sql.conf.ext +} + +# "prefetch" user database means that the passdb already provided the +# needed information and there's no need to do a separate userdb lookup. +# <doc/wiki/UserDatabase.Prefetch.txt> +#userdb { +# driver = prefetch +#} + +userdb { + driver = sql + args = /etc/dovecot/dovecot-sql.conf.ext +} + +# If you don't have any user-specific settings, you can avoid the user_query +# by using userdb static instead of userdb sql, for example: +# <doc/wiki/UserDatabase.Static.txt> +#userdb { + #driver = static + #args = uid=vmail gid=vmail home=/var/vmail/%u +#} diff --git a/doc/example-config/conf.d/auth-static.conf.ext b/doc/example-config/conf.d/auth-static.conf.ext new file mode 100644 index 0000000..90890c5 --- /dev/null +++ b/doc/example-config/conf.d/auth-static.conf.ext @@ -0,0 +1,24 @@ +# Static passdb. Included from 10-auth.conf. + +# This can be used for situations where Dovecot doesn't need to verify the +# username or the password, or if there is a single password for all users: +# +# - proxy frontend, where the backend verifies the password +# - proxy backend, where the frontend already verified the password +# - authentication with SSL certificates +# - simple testing + +#passdb { +# driver = static +# args = proxy=y host=%1Mu.example.com nopassword=y +#} + +#passdb { +# driver = static +# args = password=test +#} + +#userdb { +# driver = static +# args = uid=vmail gid=vmail home=/home/%u +#} diff --git a/doc/example-config/conf.d/auth-system.conf.ext b/doc/example-config/conf.d/auth-system.conf.ext new file mode 100644 index 0000000..dadb9f7 --- /dev/null +++ b/doc/example-config/conf.d/auth-system.conf.ext @@ -0,0 +1,74 @@ +# Authentication for system users. Included from 10-auth.conf. +# +# <doc/wiki/PasswordDatabase.txt> +# <doc/wiki/UserDatabase.txt> + +# PAM authentication. Preferred nowadays by most systems. +# PAM is typically used with either userdb passwd or userdb static. +# REMEMBER: You'll need /etc/pam.d/dovecot file created for PAM +# authentication to actually work. <doc/wiki/PasswordDatabase.PAM.txt> +passdb { + driver = pam + # [session=yes] [setcred=yes] [failure_show_msg=yes] [max_requests=<n>] + # [cache_key=<key>] [<service name>] + #args = dovecot +} + +# System users (NSS, /etc/passwd, or similar). +# In many systems nowadays this uses Name Service Switch, which is +# configured in /etc/nsswitch.conf. <doc/wiki/AuthDatabase.Passwd.txt> +#passdb { + #driver = passwd + # [blocking=no] + #args = +#} + +# Shadow passwords for system users (NSS, /etc/shadow or similar). +# Deprecated by PAM nowadays. +# <doc/wiki/PasswordDatabase.Shadow.txt> +#passdb { + #driver = shadow + # [blocking=no] + #args = +#} + +# PAM-like authentication for OpenBSD. +# <doc/wiki/PasswordDatabase.BSDAuth.txt> +#passdb { + #driver = bsdauth + # [blocking=no] [cache_key=<key>] + #args = +#} + +## +## User databases +## + +# System users (NSS, /etc/passwd, or similar). In many systems nowadays this +# uses Name Service Switch, which is configured in /etc/nsswitch.conf. +userdb { + # <doc/wiki/AuthDatabase.Passwd.txt> + driver = passwd + # [blocking=no] + #args = + + # Override fields from passwd + #override_fields = home=/home/virtual/%u +} + +# Static settings generated from template <doc/wiki/UserDatabase.Static.txt> +#userdb { + #driver = static + # Can return anything a userdb could normally return. For example: + # + # args = uid=500 gid=500 home=/var/mail/%u + # + # LDA and LMTP needs to look up users only from the userdb. This of course + # doesn't work with static userdb because there is no list of users. + # Normally static userdb handles this by doing a passdb lookup. This works + # with most passdbs, with PAM being the most notable exception. If you do + # the user verification another way, you can add allow_all_users=yes to + # the args in which case the passdb lookup is skipped. + # + #args = +#} |