Robert Moskowitz wrote:
----- Transcript of session follows ----- 554 5.0.0 MX list for 222.fax.foo.com. points back to sip.foo.com 554 5.3.5 Local configuration error
sendmail is NOT suppose to try to relay; it is suppose to accept this for local delivery, and not do a DNS lookup on 222.fax.foo.com....
You have to put the host names it is supposed to accept as local (besides the real hostname which it will find by itself) in /etc/mail/local-host-names. And you have to restart sendmail to pick up that change.