On Fri, Feb 14, 2025 at 10:31:12AM +0100, Bjoern Franke via mailop wrote:
> Hi,
>
> >
> > If the problem is actually Proxmox not implementing MX handling
> > correctly, the obvious solution is to use an MTA that does.
> >
> >
> > https://web.archive.org/web/20230308041144/https://dilbert.com/strip/1995-06-24
>
> PMG uses Postfix, so it would be weird if it couldn't handle it correctly.
The only way that Postfix would skip an MX host actually returned by the
DNS resolver is if a DNS filter was configured and then forgotten, or
MX lookups are disabled for the destination:
http://www.postfix.org/postconf.5.html#smtp_dns_reply_filter
http://www.postfix.org/postconf.5.html#smtp_dns_support_level
http://www.postfix.org/postconf.5.html#disable_dns_lookups
[SMTP SERVER LOOKUP] section of:
https://www.postfix.org/smtp.8.html
So the transport table is definitely worth a check.
--
Viktor.
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