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I am having trouble configuring my mail server. I cannot seem to get the dns entry correct.

Currently I have: RHEL 5.7 hostname = oraclemail.crpdom01.com with the ip 10.1.1.249

A Name oraclemail.crpdom.com------> 10.1.1.249

I need an mx record also. Trouble is do i cannot figure out how do do it?

mx mx1.oraclemail.crpdom01.com ------> 10.1.1.249
mx oraclemail.crpdom01.com-----> 10.1.1.249
mx mx1.oraclemail.crpdom01.com ------> A name oraclemail.crpdom01.com
mx oraclemail.crpdom01.com ------> oraclemail.crpdom01.com

Any ideas on how to configure this?

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what DNS server are you using? –  Lucas Kauffman Apr 3 '12 at 15:14
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1 Answer

As per RFC 1035, an MX record must be a canonical hostname; no A record or CNAME is allowed.

If the box is to handle mail for the entire crpdom.com domain, the record looks like this:

crpdom.com. IN MX 10 oraclemail.crpdom.com.
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It will only handle mail for anything on going to oraclemail.crpdom.com not mail for all of crpdom.com –  southard Apr 3 '12 at 15:40
    
So: mx oraclemail.crpdom01.com-----> oraclemail.crpdom01.com, just like your last row –  Sandman4 Apr 3 '12 at 16:02
    
I thought an MX record could not point to a A name record? –  southard Apr 3 '12 at 16:59
    
The A record would be the IP address for a given name, not the name. The MX record in this case points at the name. –  cjc Apr 3 '12 at 17:43
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