Le 22/07/2025 18:32, Matus UHLAR - fantomas via Postfix-users a écrit :
On 22.07.25 15:40, Xavier Humbert via Postfix-users wrote:
From: Xavier Humbert via Postfix-users <postfix-users@postfix.org>
I recently experienced strange errors in mailq :

[root@numenor ~]# mailq
-Queue ID-  --Size-- ----Arrival Time---- -Sender/Recipient-------
56BF31C9391    2320 Fri Jul 18 03:42:33  i...@quora.com
(temporary failure. Command output: lda(postfix): Error: net_connect_unix(/var/run/dovecot/stats-writer) failed: Permission denied)
                                         post...@groumpf.org

All other messages are getting in without error.
Furthermore these are probably spam which shouldn't get in, since postfix@ is not in the authorized recipients

When it happens, it is always spam for postfix@

Any idea ?

this is common issue on dovecot's side. Delivery agent needs permission to write to dovecot sockets:

https://forums.freebsd.org/threads/mail-dovecot-stats-writer-failed-permission-denied.69723/
https://dovecot.org/list/dovecot/2022-January/123745.html

Hi, Mathus

Here is the relevant part of dovecot config :

   service stats {
       unix_listener stats-reader {
           user = $default_internal_user
           group = $default_internal_user
           mode = 0660
       }

       unix_listener stats-writer {
           user = $default_internal_user
           group = $default_internal_user
           mode = 0660
       }
   }

Xavier

--
Xavier HUMBERT - Unix/Win/MacOSX Sysadmin/Network Engineer
https://www.amdh.fr

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