Thanks Craig for the reply. I changed the CNAME to an A record as you suggested. Sadly, it still loops when I send the email to the "alternate" name. It seems that OpenSMTPD doesn't realize that the two names are the same server.
I should mention that the whole reason we have an alias is that I have two servers setup as mail servers, and the alias gives us an easy way to switch hosts if one goes down (all mail is addressed to the alias). Also, I have no MX records. I don't know if I should, but Sendmail has always worked without it. On Tue, Feb 9, 2016 at 4:42 AM, Craig Skinner <[email protected]> wrote: > Hi Michael, > > On 2016-02-08 Mon 16:49 PM |, Michael Burk wrote: > > > > If I send a message to the server's CNAME, it goes into a loop which is > > eventually detected and shut down: > > > > Try switching from DNS CNAMES to DNS A records: > > RFC2181 has: > > "10.3. MX and NS records > > The domain name used as the value of a NS resource record, or part of > the value of a MX resource record must not be an alias. Not only is the > specification clear on this point, but using an alias in either of these > positions neither works as well as might be hoped, nor well fulfills the > ambition that may have led to this approach. This domain name must have > as its value one or more address records. Currently those will be A > records, however in the future other record types giving addressing > information may be acceptable. It can also have other RRs, > but never a CNAME RR. ...." > > http://tools.ietf.org/html/rfc2181#section-10.3 > > -- > You received this mail because you are subscribed to [email protected] > To unsubscribe, send a mail to: [email protected] > >
