> Michael St. Laurent <> wrote: > > I keep getting hostname lookup failures logged in the > > /var/log/maillog file such as the following: > > > > Jan 14 12:35:01 guardian sendmail[2970]: i0CAAq0P004284: > > to=<obChandler@xxxxxxxxxxxxxxxxxxx>, delay=2+10:24:09, > > xdelay=00:00:00, mailer=esmtp, pri=126210905, > > relay=insidebaltimore.net., dsn=4.0.0, stat=Deferred: Name server: > > insidebaltimore.net.: host name lookup failure > > > > Can someone help with this? > > Further research indicates that it may have to do with the fact that there > is no MX record for lists.ucla.edu. This seems to be the case for quite a > few recipients of our email though. > > Do I need to set a flag in the sendmail.mc file that will tell it to send > anyway if an AA record exists? > Is this a problem you'r having with your local mailer or with external mailers? For local mailers you could use the TryNullMXList = True (or confTRY_NULL_MX_LIST ). It's False by default. Here's a description from the README [False] If this host is the best MX for a host and other arrangements haven't been made, try connecting to the host directly; normally this would be a config error. If from other mailers, then not sure. Are you able to not send to all addresses for that domain? That could be a hint that DNS/sendmail is not configured correctly for that domain. Ben Yau -- Shrike-list mailing list Shrike-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/shrike-list
