Should I set my IP address' PTR record to the domain (mydomain.com) or the subdomain where the mail server is (mail.mydomain.com)? It's a little confusing.
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Peter Mortensen
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Jim
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To expand on my comment, here is an example of proper forward and reverse DNS for mail (methods can vary if you will have multiple mail servers, here is an example where three are load balanced):
All mail servers and priority:
$ host speakeasy.net | grep mail
speakeasy.net mail is handled by 15 mx02.speakeasy.net.
speakeasy.net mail is handled by 5 mx.speakeasy.net.
speakeasy.net mail is handled by 10 mx01.speakeasy.net.
Forward DNS on mail servers:
$ host mx.speakeasy.net
mx.speakeasy.net has address 69.17.117.60
$ host mx01.speakeasy.net
mx01.speakeasy.net has address 69.17.117.60
$ host mx02.speakeasy.net
mx02.speakeasy.net has address 69.17.117.60
RDNS for mail IP:
$ host 69.17.117.60
60.117.17.69.in-addr.arpa domain name pointer mx.speakeasy.net.
MaQleod
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