On Thu, Feb 13, 2025 at 04:54:13PM -0600, Mike Hammett via mailop wrote:
> This seems a bit elementary, but it's not working as I'd expect.
>
> I'm trying to send an email to a well-known mailing list (voiceops).
> My mail server (Proxmox Mail Gateway) seems to be skipping over the
> server at preference 0 and is trying to send to preference 10.
The MX RRset is presumably:
voiceops.org. IN MX 0 puck.nether.net.
voiceops.org. IN MX 10 mx.nether.net.
Is this what your mail sees? Have you performed any packet captures to
see the DNS requests and responses? Are connections to the primary
attempted, fail, but not logged? ...
$ dig +short -t mx voiceops.org | awk '{print $NF}' | dig +noall +ans -f -
-t a
puck.nether.net. 3600 IN A 204.42.254.5
$ dig +short -t mx voiceops.org | awk '{print $NF}' | dig +noall +ans -f -
-t aaaa
mx.nether.net. 3600 IN AAAA 2602:fe55:64:0:23:138:112:66
puck.nether.net. 3596 IN AAAA 2602:fe55:5::5
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
--
Viktor.
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