On Jul 14, 2009, at 15:32, Scott Haneda wrote:
On Jul 14, 2009, at 12:06 PM, Tim Legg wrote:
;; ANSWER SECTION:
timothylegg.com. 9220 IN MX 10 mail.timothylegg.com.
My hostname is genex.timothylegg.com on my machine and my MX record
points
to mail.timothylegg.com
I was wondering if the MX record should point to the same name as my
hostname. Obviously, this isn't too big of a problem, since my
mail works
after all. I don't know if this something that I should have
corrected or
if is it standard as it is?
The MX should point to an A record that resolves to the IP address
that postfix listens on. I believe that is the only requirement.
My postfix server will use the hostname of the ehlo/helo in a
transaction, which is not the same as my MX, and has never caused me
any trouble.
I believe your setup is perfectly reasonable, and should work fine.
My server runs on a dynamic IP address on a cable modem, and I use
dyndns.org to get to it from remote. The machine's hostname matches
the name in the MX record, but the host record in DNS is a CNAME
record, not an A record. The CNAME points to a dyndns.org hostname,
which does have an A record (which is updated by a dyndns client
running on my server). I have run things this way for a long while
with no issue. "A long while" is: years on sendmail, and months on
postfix.
Daniel
