doveadm-deduplicate1

Usage

Overview

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.

-O

Do not read any config file, just use defaults. The dovecot_storage_version setting defaults to the latest version, but can be overridden with -o.

-k

Preserve entire environment for doveadm, not just import_environment setting.

-v

Enables verbosity, including progress counter.

-i instance-name

If using multiple Dovecot instances, choose the config file based on this instance name.

See instance_name setting for more information.

-c config-file

Read configuration from the given config-file. By default it first reads config socket, and then falls back to /etc/dovecot/dovecot.conf. You can also point this to config socket of some instance running compatible version.

-o setting=value

Overrides the configuration setting from /etc/dovecot/dovecot.conf and from the userdb with the given value. In order to override multiple settings, the -o option may be specified multiple times.

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 userdb_sql_iterate_query setting setting matches your database layout.

When using the LDAP userdb module, make sure that the userdb_fields setting and userdb_ldap_iterate_fields setting settings match your LDAP schema. Otherwise doveadm(1) will be unable to iterate over all users.

-F file

Execute the command for all the users in the file. This is similar to the -A option, but instead of getting the list of users from the userdb, they are read from the given file. The file contains one username per line.

--no-userdb-lookup

Do not perform userdb lookup. Use the USER environment variable to specify the username.

-m

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

-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.

-u user/mask

Run the command only for the given user. It's also possible to use '*' and '?' wildcards (e.g. -u *@example.org).

Arguments

search_query

Examples

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