Keywords & sync

Robert Schetterer rs at
Tue Oct 7 17:03:30 UTC 2014

Am 07.10.2014 um 18:56 schrieb Ralf Hildebrandt:
> We're using keywords within Thunderbird, and we're syncing those using
> IMAP. When using more than 5 keywords, we're envcountering problems -
> they're only partially being synced (between two clients, but not all
> clients). 
> Any idea why this could be happening?
> The introduction of tagging in Thunderbird is described here:
> <>

guess you mean this


Thunderbird tries to store tags on the server using IMAP keywords. If
the IMAP server doesn't support that it will store lags locally in the
.msf file for the folder. That means that another PC can not see the labels.

A quick and dirty way to test where tags are stored would be to exit
Thunderbird and delete the .msf file, and see if the tags disappeared. A
more sophisticated way is to log into the IMAP account and to check
whether the PERMANENTFLAGS server response to the SELECT command
contains \* (see RFC 3501).This page explains how to manually connect to
an IMAP server.

Best Regards
MfG Robert Schetterer

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