Copyright (c) 2013-2018 Dovecot authors, see the included COPYING file
doveadm-deduplicate - expunge duplicate messages ------------------------------------------------------------------------
doveadm " [" -Dv "] " deduplicate " [" -u user |\c -A |\c -F " file" \c "] [" -S socket_path "] ["\c -m ] search_query ------------------------------------------------------------------------
This command is used to expunge duplicated messages in mailboxes. doveadm deduplicate is mainly useful to revert some (more or less) accidental duplication of messages, e.g. after "doveadm copy" " or " "doveadm import" . doveadm (1) will delete the newest duplicated messages from the mailbox and keep the oldest.

Deduplication across multiple mailboxes is not supported. ------------------------------------------------------------------------
@INCLUDE:global-options@ -------------------------------------

Command specific options : -------------------------------------
@INCLUDE:option-A@ -------------------------------------
@INCLUDE:option-F-file@ -------------------------------------
@INCLUDE:option-S-socket@ -------------------------------------

-m if the -m option is given, doveadm (1) will deduplicate by Message-Id header. By default deduplication will be done by message GUIDs. -------------------------------------
@INCLUDE:option-u-user@ ------------------------------------------------------------------------

search_query expunge duplicates found from messages matching the given search query. Typically a search query like \(aqmailbox mailbox_name OR mailbox other_box\(aq will be sufficient. See doveadm-search-query (7) for details. ------------------------------------------------------------------------

This example shows how to list and expunge duplicate messages from a mailbox.

doveadm -f table fetch -u jane \(aqguid uid\(aq mailbox a_Box | sort
guid uid
8aad0f0a30169f4bea620000ca356bad 18751
8aad0f0a30169f4bea620000ca356bad 18756
923e301ab9219b4b4f440000ca356bad 18748
923e301ab9219b4b4f440000ca356bad 18753
...
doveadm deduplicate -u jane mailbox a_Box
doveadm -f table fetch -u jane \(aqguid uid\(aq mailbox a_Box | sort
guid uid
8aad0f0a30169f4bea620000ca356bad 18751
923e301ab9219b4b4f440000ca356bad 18748
a7999e1530739c4bd26d0000ca356bad 18749
...

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@INCLUDE:reporting-bugs@ ------------------------------------------------------------------------
doveadm (1), doveadm-copy (1), doveadm-fetch (1), doveadm-import (1), doveadm-search-query (7)