Has no one else experienced this?  Scott, did you ever find a resolution?  For me it's only on a relay box mailing status reports so I put a special rule in smtpd.conf to send it straight to the IP of the other box on the network, so not a huge deal, but eventually I will have to upgrade my real mail server from 7.2 to 7.3 and I can't have my mail stop working so I'm curious to track down the real cause here.  DNS resolution works fine for everything else on the machine.  I notice that OpenSMTPD is 7.0.0 on both boxes so I'm actually inclined to think the changes may have been on the OpenBSD side of things and I might take this to misc@ or tech@ if we don't get anywhere here.

Thanks for your time everyone.  I sincerely appreciate all the work everyone has put into these products, and they create a great deal of value for me in my life.  Best wishes to all.

John

On 3/12/23 11:54, Scott Vanderbilt wrote:
 Just upgraded snapshots from OpenBSD 7.2-current (GENERIC.MP <http://GENERIC.MP>) #1047 to OpenBSD 7.3-beta (GENERIC.MP <http://GENERIC.MP>) #1100. So, smtpd version is OpenSMTPD 7.0.0.

All of a sudden I'm getting MX resolution errors that were not occurring immediately prior to the upgrade, e.g.

Mar 10 11:56:20 callistino smtpd[81842]: smtp-out: Failed to resolve MX for [relay:gmail.com <http://gmail.com>,smtp]: Temporary failure in MX lookup Mar 10 11:56:20 callistino smtpd[81842]: 0000000000000000 mta delivery evpid=32d4773f133f952b from=<i...@datagenius.com> <mailto:i...@datagenius.com> to=<datagen...@gmail.com> <mailto:datagen...@gmail.com> rcpt=<-> source="-" relay="gmail.com <http://gmail.com>" delay=6m40s result="TempFail" stat="Temporary failure in MX lookup"

 There have been no smtpd configuration changes, smtpd.conf is same as just prior to the snapshot upgrade.

Host name resolution using the dig and host all seem to work fine, so it doesn't seem to be a connectivity issue.

Can anyone kindly give me some pointers on how to troubleshoot this issue?

Many thanks in advance.

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