Should a PTR record resolve to the name of my mail server?
Only if you want it to.
The IP of your mailserver should have a reverse DNS entry, that resolves back to the same IP (so 192.0.2.25 has a reverse DNS entry of host.example.com, *and* host.example.com has an A record of 192.0.2.25).
Some people will complain if the reverse DNS doesn't meet their standards (the main one is that if it looks like it has an IP in it, some people will assume that the IP is a dynamic IP) -- but in almost all cases, you can ignore people doing the oddball stuff such as making sure that the PTR is the same as the HELO. If you bend over backwards to please one, it will often cause another to block you.
I just moved to a new dedicated server and the new PTR record resolves to SERVERNAME.usa.prod.interland.net. Should it go to imail.mydomain.com, which is the name of my mail server instead? Interland says that as long as their is a PTR record, then it doesn't matter.
The new PTR record should be fine.
I am not able to send mail to aol right now and I talked to them and they said I am not on their high level block list and they weren't sure what the problem is. My imail logs just say SMTP_DELIV_FAIL and the bounced message from aol says:
You'll need to check the IMail SMTP log file in detail -- it will have information such as whether IMail is using the correct IP, whether SMTP commands are being sent, etc.
-Scott
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