This is probably easier than I am making it, but my googlefu seems to be failing me at the moment when I look around. I handle a batch of FreeBSD servers running sendmail, and I am having a site that is trying to deliver mail being rejected, but they swear their DNS is right, so I am not sure if we have an issue, or they do.
I am seeing sendmail rejects like this: Sep 20 14:45:59 mail3 mail3-smtp[15388]: r8JE8kQg099367: to=<jmetey...@panini.co.uk>, delay=1+04:37:10, xdelay=00:00:31, mailer=esmtp, pri=5259883, relay=smtp2.panini.co.uk., dsn=4.0.0, stat=Deferred: Name server: smtp2.panini.co.uk.: host name lookup failure If I take and run a host lookup, I get a response like this: $ host panini.co.uk panini.co.uk mail is handled by 10 smtp.panini.co.uk. panini.co.uk mail is handled by 20 smtp2.panini.co.uk. Now if I try that on any of the hosts that should accept the mail, I see: $ host smtp.panini.co.uk smtp.panini.co.uk is an alias for smtp.panini.it. smtp.panini.it has address 151.12.160.24 Host smtp.panini.it not found: 3(NXDOMAIN) $ host smtp2.panini.co.uk smtp2.panini.co.uk is an alias for smtp2.panini.it. smtp2.panini.it has address 151.12.160.30 Host smtp2.panini.it not found: 3(NXDOMAIN) So I get the IP address returned, but then an NXDOMAIN that follows. I do have the BrokenAAAA config option in my sendmail, so know it's not that, or I don't think so. Yet if I do a dig on the hosts, they seem to come back with an IP address as expected, and shown above. So if anyone can offer a clue on this, it would be appreciated.. --- Howard Leadmon _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
