I have a registered domain name .com. The MX record points to my
public IP, goes through my PIX, NATs, goes to my Barracuda and then to
my main office exchange 2003 server. Have a second office, in the
same domain with an exchange server. I have a routing group setup so
that all mail comes back to the main office and leaves from there. My
internal domain is different then my registered, ending in .local. I
want to change the default SMTP virtual server name to
mail.registereddomain.com (from servername.internaldomain.local), but
when I do, people in my branch office can not send mail externally.
It comes back <branchofficeservername.internaldomain.local #5.5.0 smtp;
550 < XXXX@XXXXX.COM >: Recipient address rejected: No such domain at
this location. Internal mail flows fine. Users at the main office
have no problem with internal or external mail. I am pretty sure that
it is just a DNS entry that needs to be added or changed, but I
haven't been able to find anything more specific in my searches.
Hopefully someone can help me out with some specific instructions on
what I need to do in my DNS. I tried adding an A record of
mail.registereddomain.com to my forward look up zone, but that did not
work. Can someone tell me more specifacally what record and where it
needs to be placed to fix this?