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Reverse DNS entries for MX records

Discussion in 'Bind / DNS / Nameserver Issues' started by viooltje, Nov 29, 2006.

  1. viooltje

    viooltje Well-Known Member

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    dnsreport.com

    displays the

    Reverse DNS entries for MX records

    OK. The IPs of all of your mail server(s) have reverse DNS (PTR) entries. RFC1912 2.1 says you should have a reverse DNS for all your mail servers. It is strongly urged that you have them, as many mailservers will not accept mail from mailservers with no reverse DNS entry. Note that this information is cached, so if you changed it recently, it will not be reflected here (see the www.DNSstuff.com Reverse DNS Tool for the current data). The reverse DNS entries are:

    23.254.98.66.in-addr.arpa svr2.buyinnovations.com. [TTL=84071]

    >>but that IP adress does not belong to me what does this mean?

    66.98.255.*** = ns1
    66.98.255.*** = ns2
    66.98.254.*** = all accounts

    I'm having thisproblem aswell, I tried remove the eximmailtrap but there is not such file or dir.
    unrouteable mail domain

    thank you for time for looking into this any help would apreciated.
     
  2. freedog96150

    freedog96150 Well-Known Member

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    That appears to be correct. Remember that a Reverse DNS entry is just that, reversed. So for an entry like 1.2.3.4 the reverse would be 4.3.2.1.in-addr.arpa

    To oversimplify, to create your reverse DNS entry, you reverse your ip address and add the ".in-addr.arpa" extension.
     
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