[Dovecot] Multiple Concurrent IMAP Connections For Same User

Dave McGuire mcguire at neurotica.com
Sat Mar 5 18:10:22 EET 2011

   Ok, this is too weird.  Not ten seconds ago I sent a message to the 
list about what could be exactly this problem.  I'd been fighting with 
it for ages but only today became annoyed enough to send a message about it.

   So telling Thunderbird to only use one server connection solves this 


On 3/5/11 11:04 AM, Stephen Usher wrote:
> I know that this is a somewhat old thread but I do have some useful input.
> Basically, this seems to be a Thunderbird problem (or at least an
> interaction problem between Thunderbird and Dovecot).
> Before Thunderbird version 3 there wasn't a problem, the mailbox within
> Thunderbird would sync correctly. As of version 3 they seem to have
> changed their mailbox header list caching code and it gets horribly
> confused when mails disappear from the mailbox without it doing so. The
> only way to fix the view within the program is the rebuild the
> (Thunderbird) index.
> This is not the only problem TB3 has with Dovecot. Quite often if there
> are large attachments TB doesn't fully load the attachments (and
> sometimes not even the mail itself). I've found changing TBs setting so
> that it only uses one connection to the server rather than the default 5
> helps mitigate this.
> I'm not sure why TB3 has such a hard time when talking to Dovecot as no
> other clients have any difficulty and TB2 never did.
> Steve
> P.S. Our system is a Solaris 10 x86 box running Dovecot 1.2.x with
> Maildir++ folders.

Dave McGuire
Port Charlotte, FL

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