How would I setup reverse DNS for 2 email servers?

Posted by Solignis on Server Fault See other posts from Server Fault or by Solignis
Published on 2011-06-22T21:52:09Z Indexed on 2011/06/23 0:24 UTC
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dns

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reverse-dns

I have an interesting DNS question (well interesting to me atleast).

I just installed an hmail server in our remote office to act as an MX backup in the event our exchange server goes down.

The 2 host names are

mail.campbellsurvey.com mail2.campbellsurvey.com

mail points to the address 98.XXX.91.XXX mail2 points to the address 70.XXX.190.XXX

How would I setup a PTR record on the ISP end to reflect both hostnames?

Does the PTR have to point to EXACTLY mail.campbellsurvey.com or can it point to just campbellsurvey.com?

because right now anything passing through the primary static address in our pool (the one used for standard internet) is identified as mail.campbellsurvey.com. My only idea to fix this was to move the mail server to the next available address and give it only it the name mail.campbellsurvey.com but I wanted to see if there was another way.

Thanks in advance.

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