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 configured 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@dovecot.org>.
       Information about reporting bugs is available at: http://dovecot.org/bugreport.html

SEE ALSO

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