Christian H. Kuhn via Postfix-users:
> 2025-06-20T21:30:02.124789+02:00 bywater postfix/smtp[668080]:
> 121921E4995: to=<www-d...@qno.de>, relay=none, delay=0.03,
> delays=0.03/0/0/0, dsn=5.4.6, status=bounced (mail for qno.de loops back
> to myself)
I see only one inet_interfaces setting, and two differfent myhostname
settings. The Postfix SMTP client detects a mail loop when it
wants to connect to port 25 and:
- Either the server IP address matches the client's inet_interfaces
setting (in this case Postfix does not even attempt to connect).
- Or the server greets the client with the client's myhostname (in
this case the client logs that the server greets with its own hostname).
Which scenario is it?
I suggest setting inet_interfaces explcitly for both Postfix
instances.
Wietse
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