mbtool - Cyrus IMAP documentation

       The Cyrus Team

       1993–2025, The Cyrus Team

3.10.1                                            Jan 22, 2025                                         MBTOOL(8)

mbtool  is  a tool for performing various actions on the indexes of a list of mailboxes. The only actions
       currently supported are -t, which will normalize the internaldate time stamp of each record in the  index
       to GMT, and -r which will create a new unique ID for each mailbox.

       Only one action may be given and at least mailbox must be listed.

       It is intended that mbtool will be extended over time to perform more such actions.

       mbtool reads its configuration options out of the imapd.conf(5) file unless specified otherwise by -C.

mbtool-r user.jsmith
          CreatenewUUIDformailboxuser.jsmith.mbtool-tuser.jsmithNormalizeinternaldateonallindexrecordsinuser.jsmith.

       /etc/imapd.conf

       mbtool - Cyrus IMAP documentation

       intro

-Cconfig-file
              Use the specified configuration file config-file rather than the default imapd.conf(5).

       -t,--normalize-internaldate
              Normalize  internaldate  on all index records of all listed mailboxes to match the Date: header if
              they're off by more than a day, which can be used to fix up a mailbox which has been restored from
              backup and lost its internaldate information.

       -r,--new-uniqueid
              Create a new unique ID for all listed mailboxes.  Only works for legacy mailboxes.

imapd.conf(5)

mbtool [ -Cconfig-file ] -rmailbox...
          mbtool [ -Cconfig-file ] -tmailbox...