Re: Very slow mail download/notification with dovecot 2.3.7 and Thunderbird​

Juri Haberland juri at
Sun Dec 27 17:11:03 EET 2020

On 27/12/2020 15:11, ml_dovecot at wrote:

> And it seems that some folders are never updated in TB. In example I
> sort all messages from this list into a "INBOX.Mailinglists.ML-Dovecot"
> subfolder by using a simple sieve rule. But even after 10 minutes TB
> thinks that there are no new messages. As soon as I click on the
> ML-Dovecot folder I see in the /var/log/dovecot-info.log file that TB
> logs on to the server and then displays hundreds, of new messages. I
> checked twice but I have subscribed to all 228 folders.

I can't help you with your performance problem, but for Thunderbird to
check all folders, you need to set "mail.check_all_imap_folders_for_new"
to 'true' in the Thunderbird config editor.


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