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Diffstat (limited to 'conf/virtual')
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diff --git a/conf/virtual b/conf/virtual new file mode 100644 index 0000000..96390fe --- /dev/null +++ b/conf/virtual @@ -0,0 +1,324 @@ +# VIRTUAL(5) VIRTUAL(5) +# +# NAME +# virtual - Postfix virtual alias table format +# +# SYNOPSIS +# postmap /etc/postfix/virtual +# +# postmap -q "string" /etc/postfix/virtual +# +# postmap -q - /etc/postfix/virtual <inputfile +# +# DESCRIPTION +# The optional virtual(5) alias table rewrites recipient +# addresses for all local, all virtual, and all remote mail +# destinations. This is unlike the aliases(5) table which +# is used only for local(8) delivery. Virtual aliasing is +# recursive, and is implemented by the Postfix cleanup(8) +# daemon before mail is queued. +# +# The main applications of virtual aliasing are: +# +# o To redirect mail for one address to one or more +# addresses. +# +# o To implement virtual alias domains where all +# addresses are aliased to addresses in other +# domains. +# +# Virtual alias domains are not to be confused with +# the virtual mailbox domains that are implemented +# with the Postfix virtual(8) mail delivery agent. +# With virtual mailbox domains, each recipient +# address can have its own mailbox. +# +# Virtual aliasing is applied only to recipient envelope +# addresses, and does not affect message headers. Use +# canonical(5) mapping to rewrite header and envelope +# addresses in general. +# +# Normally, the virtual(5) alias table is specified as a +# text file that serves as input to the postmap(1) command. +# The result, an indexed file in dbm or db format, is used +# for fast searching by the mail system. Execute the command +# "postmap /etc/postfix/virtual" to rebuild an indexed file +# after changing the corresponding text file. +# +# When the table is provided via other means such as NIS, +# LDAP or SQL, the same lookups are done as for ordinary +# indexed files. +# +# Alternatively, the table can be provided as a regu- +# lar-expression map where patterns are given as regular +# expressions, or lookups can be directed to a TCP-based +# server. In those case, the lookups are done in a slightly +# different way as described below under "REGULAR EXPRESSION +# TABLES" or "TCP-BASED TABLES". +# +# CASE FOLDING +# The search string is folded to lowercase before database +# lookup. As of Postfix 2.3, the search string is not case +# folded with database types such as regexp: or pcre: whose +# lookup fields can match both upper and lower case. +# +# TABLE FORMAT +# The input format for the postmap(1) command is as follows: +# +# pattern address, address, ... +# When pattern matches a mail address, replace it by +# the corresponding address. +# +# blank lines and comments +# Empty lines and whitespace-only lines are ignored, +# as are lines whose first non-whitespace character +# is a `#'. +# +# multi-line text +# A logical line starts with non-whitespace text. A +# line that starts with whitespace continues a logi- +# cal line. +# +# TABLE SEARCH ORDER +# With lookups from indexed files such as DB or DBM, or from +# networked tables such as NIS, LDAP or SQL, each +# user@domain query produces a sequence of query patterns as +# described below. +# +# Each query pattern is sent to each specified lookup table +# before trying the next query pattern, until a match is +# found. +# +# user@domain address, address, ... +# Redirect mail for user@domain to address. This +# form has the highest precedence. +# +# user address, address, ... +# Redirect mail for user@site to address when site is +# equal to $myorigin, when site is listed in $mydes- +# tination, or when it is listed in $inet_interfaces +# or $proxy_interfaces. +# +# This functionality overlaps with the functionality +# of the local aliases(5) database. The difference is +# that virtual(5) mapping can be applied to non-local +# addresses. +# +# @domain address, address, ... +# Redirect mail for other users in domain to address. +# This form has the lowest precedence. +# +# Note: @domain is a wild-card. With this form, the +# Postfix SMTP server accepts mail for any recipient +# in domain, regardless of whether that recipient +# exists. This may turn your mail system into a +# backscatter source: Postfix first accepts mail for +# non-existent recipients and then tries to return +# that mail as "undeliverable" to the often forged +# sender address. +# +# To avoid backscatter with mail for a wild-card +# domain, replace the wild-card mapping with explicit +# 1:1 mappings, or add a reject_unverified_recipient +# restriction for that domain: +# +# smtpd_recipient_restrictions = +# ... +# reject_unauth_destination +# check_recipient_access +# inline:{example.com=reject_unverified_recipient} +# unverified_recipient_reject_code = 550 +# +# In the above example, Postfix may contact a remote +# server if the recipient is aliased to a remote +# address. +# +# RESULT ADDRESS REWRITING +# The lookup result is subject to address rewriting: +# +# o When the result has the form @otherdomain, the +# result becomes the same user in otherdomain. This +# works only for the first address in a multi-address +# lookup result. +# +# o When "append_at_myorigin=yes", append "@$myorigin" +# to addresses without "@domain". +# +# o When "append_dot_mydomain=yes", append ".$mydomain" +# to addresses without ".domain". +# +# ADDRESS EXTENSION +# When a mail address localpart contains the optional recip- +# ient delimiter (e.g., user+foo@domain), the lookup order +# becomes: user+foo@domain, user@domain, user+foo, user, and +# @domain. +# +# The propagate_unmatched_extensions parameter controls +# whether an unmatched address extension (+foo) is propa- +# gated to the result of a table lookup. +# +# VIRTUAL ALIAS DOMAINS +# Besides virtual aliases, the virtual alias table can also +# be used to implement virtual alias domains. With a virtual +# alias domain, all recipient addresses are aliased to +# addresses in other domains. +# +# Virtual alias domains are not to be confused with the vir- +# tual mailbox domains that are implemented with the Postfix +# virtual(8) mail delivery agent. With virtual mailbox +# domains, each recipient address can have its own mailbox. +# +# With a virtual alias domain, the virtual domain has its +# own user name space. Local (i.e. non-virtual) usernames +# are not visible in a virtual alias domain. In particular, +# local aliases(5) and local mailing lists are not visible +# as localname@virtual-alias.domain. +# +# Support for a virtual alias domain looks like: +# +# /etc/postfix/main.cf: +# virtual_alias_maps = hash:/etc/postfix/virtual +# +# Note: some systems use dbm databases instead of hash. See +# the output from "postconf -m" for available database +# types. +# +# /etc/postfix/virtual: +# virtual-alias.domain anything (right-hand content does not matter) +# postmaster@virtual-alias.domain postmaster +# user1@virtual-alias.domain address1 +# user2@virtual-alias.domain address2, address3 +# +# The virtual-alias.domain anything entry is required for a +# virtual alias domain. Without this entry, mail is rejected +# with "relay access denied", or bounces with "mail loops +# back to myself". +# +# Do not specify virtual alias domain names in the main.cf +# mydestination or relay_domains configuration parameters. +# +# With a virtual alias domain, the Postfix SMTP server +# accepts mail for known-user@virtual-alias.domain, and +# rejects mail for unknown-user@virtual-alias.domain as +# undeliverable. +# +# Instead of specifying the virtual alias domain name via +# the virtual_alias_maps table, you may also specify it via +# the main.cf virtual_alias_domains configuration parameter. +# This latter parameter uses the same syntax as the main.cf +# mydestination configuration parameter. +# +# REGULAR EXPRESSION TABLES +# This section describes how the table lookups change when +# the table is given in the form of regular expressions. For +# a description of regular expression lookup table syntax, +# see regexp_table(5) or pcre_table(5). +# +# Each pattern is a regular expression that is applied to +# the entire address being looked up. Thus, user@domain mail +# addresses are not broken up into their user and @domain +# constituent parts, nor is user+foo broken up into user and +# foo. +# +# Patterns are applied in the order as specified in the ta- +# ble, until a pattern is found that matches the search +# string. +# +# Results are the same as with indexed file lookups, with +# the additional feature that parenthesized substrings from +# the pattern can be interpolated as $1, $2 and so on. +# +# TCP-BASED TABLES +# This section describes how the table lookups change when +# lookups are directed to a TCP-based server. For a descrip- +# tion of the TCP client/server lookup protocol, see tcp_ta- +# ble(5). This feature is available in Postfix 2.5 and +# later. +# +# Each lookup operation uses the entire address once. Thus, +# user@domain mail addresses are not broken up into their +# user and @domain constituent parts, nor is user+foo broken +# up into user and foo. +# +# Results are the same as with indexed file lookups. +# +# BUGS +# The table format does not understand quoting conventions. +# +# CONFIGURATION PARAMETERS +# The following main.cf parameters are especially relevant +# to this topic. See the Postfix main.cf file for syntax +# details and for default values. Use the "postfix reload" +# command after a configuration change. +# +# virtual_alias_maps ($virtual_maps) +# Optional lookup tables that alias specific mail +# addresses or domains to other local or remote +# addresses. +# +# virtual_alias_domains ($virtual_alias_maps) +# Postfix is the final destination for the specified +# list of virtual alias domains, that is, domains for +# which all addresses are aliased to addresses in +# other local or remote domains. +# +# propagate_unmatched_extensions (canonical, virtual) +# What address lookup tables copy an address exten- +# sion from the lookup key to the lookup result. +# +# Other parameters of interest: +# +# inet_interfaces (all) +# The network interface addresses that this mail sys- +# tem receives mail on. +# +# mydestination ($myhostname, localhost.$mydomain, local- +# host) +# The list of domains that are delivered via the +# $local_transport mail delivery transport. +# +# myorigin ($myhostname) +# The domain name that locally-posted mail appears to +# come from, and that locally posted mail is deliv- +# ered to. +# +# owner_request_special (yes) +# Enable special treatment for owner-listname entries +# in the aliases(5) file, and don't split owner-list- +# name and listname-request address localparts when +# the recipient_delimiter is set to "-". +# +# proxy_interfaces (empty) +# The network interface addresses that this mail sys- +# tem receives mail on by way of a proxy or network +# address translation unit. +# +# SEE ALSO +# cleanup(8), canonicalize and enqueue mail +# postmap(1), Postfix lookup table manager +# postconf(5), configuration parameters +# canonical(5), canonical address mapping +# +# README FILES +# Use "postconf readme_directory" or "postconf html_direc- +# tory" to locate this information. +# ADDRESS_REWRITING_README, address rewriting guide +# DATABASE_README, Postfix lookup table overview +# VIRTUAL_README, domain hosting guide +# +# LICENSE +# The Secure Mailer license must be distributed with this +# software. +# +# AUTHOR(S) +# Wietse Venema +# IBM T.J. Watson Research +# P.O. Box 704 +# Yorktown Heights, NY 10598, USA +# +# Wietse Venema +# Google, Inc. +# 111 8th Avenue +# New York, NY 10011, USA +# +# VIRTUAL(5) |