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DOVEADM-DEDUPLICATE(1)			     Dovecot			   DOVEADM-DEDUPLICATE(1)

NAME
       doveadm-deduplicate - expunge duplicate messages

SYNOPSIS
       doveadm [-Dv] deduplicate [-u user|-A] [-S socket_path] [-m] search_query

DESCRIPTION
       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.

OPTIONS
       Global doveadm(1) options:

       -D     Enables verbosity and debug messages.

       -v     Enables verbosity, including progress counter.

       Command specific options:

       -A     If the -A option is present, the command will be performed for  all  users.   Using
	      this option in combination with system users from userdb { driver = passwd } is not
	      recommended, because it contains also users with a lower UID than the  one  config-
	      ured with the first_valid_uid setting.

	      When  the  SQL  userdb  module  is used make sure that the iterate_query setting in
	      /etc/dovecot/dovecot-sql.conf.ext matches your database  layout.	 When  using  the
	      LDAP userdb module, make sure that the iterate_attrs and iterate_filter settings in
	      /etc/dovecot/dovecot-ldap.conf.ext match your LDAP  schema.   Otherwise  doveadm(1)
	      will be unable to iterate over all users.

       -S socket_path
	      The  option's argument is either an absolute path to a local UNIX domain socket, or
	      a hostname and port (hostname:port), in order to connect a remote host  via  a  TCP
	      socket.

	      This  allows an administrator to execute doveadm(1) mail commands through the given
	      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.

       -u user/mask
	      Run  the	command  only  for the given user.  It's also possible to use '*' and '?'
	      wildcards (e.g. -u *@example.org).
	      When neither the -A option nor -u user was specified, the command will be  executed
	      with the environment of the currently logged in user.

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

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

       doveadm -f table fetch -u jane 'guid uid' 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 'guid uid' mailbox a_Box | sort
       guid				uid
       8aad0f0a30169f4bea620000ca356bad 18751
       923e301ab9219b4b4f440000ca356bad 18748
       a7999e1530739c4bd26d0000ca356bad 18749
       ...

REPORTING BUGS
       Report  bugs,  including  doveconf  -n  output, to the Dovecot Mailing List <dovecot@dove-
       cot.org>.  Information about reporting bugs  is	available  at:	http://dovecot.org/bugre-
       port.html

SEE ALSO
       doveadm(1), doveadm-copy(1), doveadm-fetch(1), doveadm-import(1), doveadm-search-query(7)

Dovecot v2.2				    2013-08-03			   DOVEADM-DEDUPLICATE(1)
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