Dear Users,
I'm debugging since several days a mailman3 installation and can not get
mailman to deliver mails to list members.
Mailman logs Cannot connect to SMTP server, however the server is
listening, but i see no connection attempts.
In queue/out, i see changing files all the time:
drwxrwx--- 2 mailman nogroup 4.0K Jun 4 13:04 .
drwxr-xr-x 15 mailman nogroup 4.0K Jun 4 08:22 ..
-rw-rw---- 1 mailman nogroup 6.1K Jun 4 12:22
1780575734.9281623+0ad5f564c9fc5f27750a09b948f3480d9047cbaa.pck.tmp
-rw-rw---- 1 mailman nogroup 6.1K Jun 4 13:04
1780578250.2070453+752ca17af5c64af7aab5f0fc61ac2ea28b091825.bak
038b90c74d8d:/opt/mailman/var/queue/out# ls -alh
total 24K
drwxrwx--- 2 mailman nogroup 4.0K Jun 4 13:04 .
drwxr-xr-x 15 mailman nogroup 4.0K Jun 4 08:22 ..
-rw-rw---- 1 mailman nogroup 6.1K Jun 4 12:22
1780575734.9281623+0ad5f564c9fc5f27750a09b948f3480d9047cbaa.pck.tmp
-rw-rw---- 1 mailman nogroup 6.1K Jun 4 13:04
1780578250.7552953+6350a013583657c317c0a64b9cf2039dca645974.bak
038b90c74d8d:/opt/mailman/var/queue/out#
SMTP/DEBUG-Log is flooded with over and over same attempts:
==> /opt/mailman/core/var/logs/smtp.log <==
Jun 04 13:04:46 2026 (26) Using agent: <mailman.mta.deliver.Deliver object
at 0x79ed98555310>
Jun 04 13:04:46 2026 (26) IndividualDelivery to: cubewerk(a)gmail.com
==> /opt/mailman/core/var/logs/debug.log <==
Jun 04 13:04:46 2026 (31) [VirginRunner] starting oneloop
Jun 04 13:04:46 2026 (31) [VirginRunner] ending oneloop: 0
Jun 04 13:04:46 2026 (26) [OutgoingRunner] finishing filebase:
1780578286.711373+091038a49a00758fdd2ba5265714e2fa31ea4843
Jun 04 13:04:46 2026 (26) [OutgoingRunner] doing periodic
Jun 04 13:04:46 2026 (26) [OutgoingRunner] committing transaction
Jun 04 13:04:46 2026 (26) [OutgoingRunner] checking short circuit
Jun 04 13:04:46 2026 (26) [OutgoingRunner] ending oneloop: 1
Jun 04 13:04:46 2026 (26) [OutgoingRunner] starting oneloop
Jun 04 13:04:46 2026 (26) [OutgoingRunner] processing filebase:
1780578286.7329357+2ec378350ee99307adc287fc8727fb9120a385d3
Jun 04 13:04:46 2026 (26) [OutgoingRunner] processing onefile
Jun 04 13:04:46 2026 (26) [outgoing] <function deliver at 0x79ed98b85d00>:
<gxZS.-LyKCSHn9UWsyVepCakA9g(a)flTQyy2_BUC0KFtMliiieCkabFXP1SdNnP1xIyNQp-k.xz>
==> /opt/mailman/core/var/logs/smtp.log <==
Jun 04 13:04:46 2026 (26) Using agent: <mailman.mta.deliver.Deliver object
at 0x79ed98a43bf0>
Jun 04 13:04:46 2026 (26) IndividualDelivery to: cubewerk(a)gmail.com
If i restart the docker-core container, i see a single time the error
"Cannot connect to SMTP server 172.17.0.1 on port 587".
my config:
[runner.retry]
sleep_time: 10s
[webservice]
hostname: 172.18.0.2
port: 8001
admin_user: restadmin
admin_pass: restpass
configuration: /etc/gunicorn.cfg
[mta]
incoming: mailman.mta.postfix.LMTP
outgoing: mailman.mta.deliver.deliver
lmtp_host: 172.18.0.2
lmtp_port: 8024
smtp_host: 172.17.0.1
smtp_port: 587
smtp_user:
smtp_pass:
smtp_secure_mode: starttls
smtp_verify_hostname: false
smtp_verify_cert: false
configuration: /etc/postfix-mailman.cfg
[logging.smtp]
level: debug
[logging.error]
level: debug
[logging.debug]
level: debug
[archiver.mail_archive]
enable: no
configuration: /opt/mailman/mail_archive_dummy.cfg
[archiver.hyperkitty]
class: mailman_hyperkitty.Archiver
enable: yes
configuration: /etc/mailman-hyperkitty.cfg
Any helps is greatly appreciated.
thank you.
Stefan
