30 Mar
2020
30 Mar
'20
6:39 p.m.
On 30/03/2020 18:32 tim@linux-daus.de wrote:
Hi Aki,
Aki Tuomi aki.tuomi@open-xchange.com hat am 30. März 2020 16:23 geschrieben:
Can you install dovecot-dbg to get debug symbols, open the core in gdb and run
bt full
Full backtrace:
<snip />
Best regards, Tim
It seems that your configuration ends up passing empty host from the user lookup to DNS resolve. This should be handled earlier of course, if this is really the case.
Do you have any idea which user is triggering this based on logs? You could try 'doveadm auth lookup <username>' to see if you are getting bad values? Are you able to turn on 'auth_debug=yes', I understand it might be high volume with 7k logins.
Aki