Mail is not responding

Support
,
1

NethServer Version: NS8
Module: Mail Version 1.7.11

A user reported issues with the email client.

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At first, I suspected a certificate problem.

However, upon checking, it turned out that the DNS and TLS were working correctly, but the SMTP service was not responding.

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My attempt to get to the bottom of it was clearly misguided.

root@ns-srv01:~# runagent -m mail2 systemctl status postfix
Unit postfix.service could not be found.

What should I do? Even restarting the computer hasn’t solved the problem.

Strangely enough, test emails arrive in other accounts and can be replied to.

Best regards, MArko

2

From here SMTP is reachable.

Maybe CrowdSec is blocking the users IP?

It’s a user service:

runagent -m mail2 systemctl --user status postfix
3

I will check crwodsec.

root@ns-srv01:~# runagent -m mail2 systemctl --user status postfix
● postfix.service - Postfix MTA/MSA server
     Loaded: loaded (/home/mail2/.config/systemd/user/postfix.service; enabled; preset: enabled)
     Active: active (running) since Mon 2026-04-20 16:40:07 CEST; 35min ago
    Process: 3477 ExecStartPre=/bin/rm -f /run/user/1004/postfix.pid /run/user/1004/postfix.ctr-id (code=exited, st>
    Process: 3478 ExecStartPre=/bin/mkdir -vp pcdb (code=exited, status=0/SUCCESS)
    Process: 3479 ExecStartPre=runagent discover-services (code=exited, status=0/SUCCESS)
    Process: 3510 ExecStart=/usr/bin/podman run --detach --conmon-pidfile=/run/user/1004/postfix.pid --cidfile=/run>
    Process: 5295 ExecReload=runagent discover-services (code=exited, status=0/SUCCESS)
    Process: 5299 ExecReload=bash -c cd tls-certs ; umask 177 ; cat server.key server.pem > fullchain.pem ; touch ->
    Process: 5301 ExecReload=runagent /usr/bin/podman exec --env-file=discovery.env --env=POSTFIX_* postfix reload->
   Main PID: 3555 (conmon)
      Tasks: 1 (limit: 9483)
     Memory: 15.3M
        CPU: 2.137s
     CGroup: /user.slice/user-1004.slice/user@1004.service/app.slice/postfix.service
             └─3555 /usr/bin/conmon --api-version 1 -c 1345019439dec31767fe85016ea9274fd1213d21c22a384ebcf7d05e2a40>

Apr 20 16:40:07 ns-srv01 podman[3510]: 2026-04-20 16:40:07.803540999 +0200 CEST m=+2.452184580 container start 1345>
Apr 20 16:40:07 ns-srv01 postfix[3510]: 1345019439dec31767fe85016ea9274fd1213d21c22a384ebcf7d05e2a400241
Apr 20 16:40:07 ns-srv01 systemd[3374]: Started postfix.service - Postfix MTA/MSA server.
Apr 20 16:40:09 ns-srv01 postfix[3555]: postfix/postlog: starting the Postfix mail system
Apr 20 16:55:58 ns-srv01 systemd[3374]: Reloading postfix.service - Postfix MTA/MSA server...
Apr 20 16:55:59 ns-srv01 postfix[5295]: systemctl --user --quiet is-enabled clamav.service
Apr 20 16:55:59 ns-srv01 podman[5301]: 2026-04-20 16:55:59.418277726 +0200 CEST m=+0.069310734 container exec 13450>

The validator had a glitch, but is now working perfectly again.

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