dovecot - Mar 2018 - Slow imap connection to local dovecot server

Hi,

this is my setup:

OpenSuse tumbleweed
dovecot 2.3.0.1 (ffd8a29)
thunderbird 52.6.0

I'm running a local dovecot server on my private network to be able to 
access my saved mails from several computers on the network. The network 
is behind a firewall, therefore I'm only using plain imap on port 143 
with plain text password authentification. But very often the login from 
thunderbird to the dovecot server takes a very long time, even if 
thunderbird and dovecot are running on the same machine. It can take 
more than a minute until I can read a message. I dont't have this 
problem with the remote imap servers of my mail providers.

Does anybody know, why this happens or how I could debug this issue?

On Sun, 25 Mar 2018, Lothar Paltins wrote:
> But very often the login from thunderbird to the dovecot server takes a
> very long time, even if thunderbird and dovecot are running on the same
> machine.  It can take more than a minute until I can read a message.  I
> dont't have this problem with the remote imap servers of my mail
> providers.
Sounds vaguely like a file locking problem.
> Does anybody know, why this happens or how I could debug this issue?
Turn on verbose logging, then see if you can trigger the problem.  Also,
doveconf -n would help.

Joseph Tam <jtam.home at gmail.com>

Hi Joseph,

thanks for your answer. I have now downloaded and compiled the 
"original" dovecot-2.3.0.1 package and the slow login issue is gone.
So
it isn't an issue of dovecot or my configuration, but a problem of the 
OpenSuse rpm package.

Best regards
-- 
Lothar Paltins                                        lptmp10 at arcor.de