Our domain at work was a single Windows 2003 server (fileserver.domain.local) Then I added an Exchange 2003 server as a member server and simply added it to the domain (exchange.domain.local). I then ran the SMTP wizard which appears to have amended the recipients policy by adding mydomain.org.uk as a suffix so that when I add a new user it automatically creates 3 email addresses for them (firstname.lastname@example.org - email@example.com & an X400 one).
Everything seemed to be working fine, users were able to send and recieve internal and external emails however I noticed that emails sent to AOL were getting delayed and then were unable to be delivered so I ran my mailserver IP through dnsstuff and it appeared that I didn't have a PTR record. I contacted my ISP who set this up for me however they were unable to set the record to point to exchange.domain.local, they had to set it to exchange.domain.org.uk (which obviously isn't the name of my mailserver)
AOL emails still aren't going so I wondered if anyone could advise on what to do next? Can I simply change my server name to domain.org.uk or will that break anything?