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problem with e-mails to AOL

bmwRS100
Hello,

i've a problem sending mails to AOL e-mail accounts. I've asked an AOL-administrator why they blocked our mails. Here is his answer:

 Your Mailserver with the IP xxx.xxx.xxx.xxx has no revers DNS (PTR). Your Configuration agrees not with RFC1912 2.1 

Our MX Record points to the astaro and the ip-# is correct.

Hope someone knows my problem.

thx


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  • 0 in reply to maygyver
    Hi,

    thats common practice with AOL and other mayor MAILERS. They make a reverse lookup of your external IP address, and if it dosen't match with the sender domain, it will get dropped. 

    There are two ways to lookup: 
    forward lookup means name to ip address,
    recursiv means ip address to name.
    So you need a zone for your public ip block. In this zone there has to be a pointer, witch points to the name.
    written recursiv: ip is 111.222.333.444
    so the zone entry would look like
    444.333.222.111.in-addr.arpa IN PTR name.domain.tld

    Chris
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