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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 09:51:24 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 09:51:24 +0000
commitf7548d6d28c313cf80e6f3ef89aed16a19815df1 (patch)
treea3f6f2a3f247293bee59ecd28e8cd8ceb6ca064a /doc/wiki/MailboxFormat.imapc.txt
parentInitial commit. (diff)
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Adding upstream version 1:2.3.19.1+dfsg1.upstream/1%2.3.19.1+dfsg1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+imapc storage
+=============
+
+The imapc storage accesses a remote IMAP server as if it were a regular Dovecot
+mailbox format. Dovecot can treat it as a very dummy storage or optionally a
+more capable storage.
+
+---%<-------------------------------------------------------------------------
+# In-memory index files:
+mail_location = imapc:
+
+# Store index files locally:
+mail_location = imapc:~/imapc
+---%<-------------------------------------------------------------------------
+
+Connection settings
+-------------------
+
+Do a regular IMAP LOGIN to imap.example.com using 'a LOGIN user@example.com
+secret':
+
+---%<-------------------------------------------------------------------------
+imapc_host = imap.example.com
+imapc_password = secret
+imapc_port = 143
+imapc_user = user@example.com
+---%<-------------------------------------------------------------------------
+
+If you want to use a master user login, set:
+
+---%<-------------------------------------------------------------------------
+imapc_master_user = masteruser
+---%<-------------------------------------------------------------------------
+
+For SSL, use either:
+
+ * ---%<----------------------------------------------------------------------
+ imapc_ssl = imaps
+ imapc_port = 993
+ ---%<----------------------------------------------------------------------
+
+ * ---%<----------------------------------------------------------------------
+ imapc_ssl = starttls
+ imapc_port = 143
+ ---%<----------------------------------------------------------------------
+
+For testing you may want to disable all SSL certificate checks:
+
+---%<-------------------------------------------------------------------------
+imapc_ssl_verify = no
+---%<-------------------------------------------------------------------------
+
+You can use other SASL mechanisms besides PLAIN by specifying (the first one
+advertised by IMAP server is used):
+
+---%<-------------------------------------------------------------------------
+imapc_sasl_mechanisms = external plain login
+---%<-------------------------------------------------------------------------
+
+The SASL client mechanisms are implemented in Dovecot's lib-sasl/ code. It's
+possible to add more with plugins.
+
+Other settings
+--------------
+
+imapc_cmd_timeout:
+ How long to wait for an IMAP command to reply before disconnecting and
+ retrying (default: 5 mins).
+
+imapc_list_prefix:
+ Access only mailboxes under this prefix. For example
+ 'imapc_list_prefix=INBOX/'
+
+imapc_max_idle_time:
+ Send something (NOOP/DONE) to server after not sending anything for this
+ amount of time (default: 29 mins).
+
+imapc_rawlog_dir:
+ Log all IMAP traffic input/output to this directory.
+
+Features and workarounds
+------------------------
+
+'imapc_features' setting is a space-separated list of features and workarounds
+that can be enabled.
+
+Optimizations
+-------------
+
+rfc822.size:
+ Allow passing through message sizes using 'FETCH RFC822.SIZE'
+
+fetch-headers:
+ Allow fetching specific message headers using 'FETCH BODY.PEEK[HEADER.FIELDS
+ (..)]'
+
+fetch-bodystructure:
+ Allow fetching BODY and BODYSTRUCTURE from remote server. (v2.2.30+)
+
+search:
+ Allow using 'SEARCH' command.
+
+Features
+--------
+
+gmail-migration:
+ Enable GMail-specific migration: Use IMAP X-GM-MSGID as POP3 UIDL. Add
+ $GMailHaveLabels keyword to mails that have X-GM-LABELS except for \Muted (to
+ be used for migrating only archived emails in "All Mails"). Add
+ pop3_deleted_flag to mails that don't exist in POP3 server.
+
+proxyauth:
+ Use Sun/Oracle IMAP-server specific PROXYAUTH command to do master user
+ authentication. Normally this would be done using the SASL PLAIN
+ authentication.
+
+throttle:INIT:MAX:SHRINK:
+ When receiving [THROTTLED] response (from GMail), throttling is applied. INIT
+ = initial throttling msecs (default: 50 ms), afterwards each subsequent
+ [THROTTLED] doubles the throttling until MAX is reached (default: 16000 ms).
+ When [THROTTLED] is not received for a while, it's shrank again. The initial
+ shrinking is done after SHRINK (default: 500 ms). If [THROTTLED] is received
+ again within this timeout, it's doubled, otherwise both throttling and the
+ next shrinking timeout is shrank to 3/4.
+
+modseq:
+ Access MODSEQ and HIGHESTMODSEQ (v2.2.24+)
+
+delay-login:
+ Don't connect to the remote server until some command requires it. By default
+ the server is connected to immediately on login. (v2.2.29+)
+
+Quota
+-----
+
+Using the "imapc" quota backend allows asking for the quota from remote IMAP
+server (v2.2.30+). By default it uses GETQUOTAROOT INBOX for getting the quota.
+There are also two parameters that can be used to control how the quota is
+looked up:
+
+ * box=<mailbox>: Use GETQUOTAROOT <mailbox>
+ * root=<name>: Use GETQUOTA <name>
+
+For example:
+
+---%<-------------------------------------------------------------------------
+plugin {
+ quota = imapc:root=User Quota
+}
+---%<-------------------------------------------------------------------------
+
+Workarounds
+-----------
+
+zimbra-workarounds:
+ Fetch full message using 'BODY.PEEK[HEADER] BODY.PEEK[TEXT]' instead of just
+ 'BODY.PEEK[]' because the header differs between these two when there are
+ illegal control chars or 8bit chars. This mainly caused problems with dsync,
+ but as of v2.2.22+ this should no longer be a problem and there's probably no
+ need to enable this workaround.
+
+no-examine:
+ Use SELECT instead of EXAMINE even when we don't want to modify anything in
+ the mailbox. This is a Courier-workaround where it didn't permanently assign
+ UIDVALIDITY to an EXAMINEd mailbox, but assigned it for SELECTed mailbox.
+
+fetch-msn-workarounds:
+ Try to ignore wrong message sequence numbers in FETCH replies whenever
+ possible, preferring to use the returned UID number instead.
+
+fetch-fix-broken-mails:
+ If a FETCH returns 'NO' (but not 'NO [LIMIT]' or 'NO [SERVERBUG]'), assume
+ the mail is broken in server and just treat it as if it were an empty email.
+ NOTE: This is often a dangerous option! It's not safe to assume that NO means
+ a permanent error rather than a temporary error. This feature should be
+ enabled only for specific users who have been determined to be broken.
+
+(This file was created from the wiki on 2019-06-19 12:42)