mbtool [ -C config-file ] -t mailboxes...
mbtool is a tool for performing various actions on the indexes of a
list of mailboxes. The only action currently supported is -t, which
will normalize the
internaldate time stamp of each record in the
index to GMT.
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.
Use the specified configuration file config-file rather than the default imapd.conf(5).
internaldateon 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.
mbtool -t user.jsmith
internaldateon all index records in user.jsmith.
Working on user.jsmith... 00000001: Tue, 08 Jul 2014 16:45:18 -0500 => Mon, 07 Jul 2014 20:44:18 +0000 00000002: Tue Jul 08 16:45:13 CDT 2013 => Fri, 30 Aug 2013 19:46:03 +0000 <...>