Hi folks,
I confess to being a bit sleep deprived these days, but I can't
figure out why some mail servers are trying to send email to my web
server rather than the mail servers. I.e. they are trying to send to
the machine with the A record for hypertouch.com which is a webserver
rather than to hypertouch.com's mail servers which are at other IP
addresses. Now the web server is running a rudimentary mail server
but it shouldn't be getting any incoming email and so rejects the
attempts as unauthorized relays.
I'd credit this to badly setup third party mailers, but Stanford
University's mail server recently bounced a message after trying to
send to hypertouch.com and I'd hate to think their outgoing mail
server is broken.
Are there any circumstances that a mail server should ever send to
the A record of a domain when that domain has MX records pointing
elsewhere? We recently had a network outage so all mail servers were
down. So if Stanford couldn't get to the machines pointed to by the
MX records, can it grab the A record as a legitimate destination for
email (and cache that result). I've turned off the mail server
functionality of the webserver in the short term but I can't
understand why I need to?
Any advise or illumination?
Joe
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