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Reverse DNS ESMTP Problem

Discussion in 'Plesk 9.x for Linux Issues, Fixes, How-To' started by Maku, Jul 11, 2011.

  1. Maku

    Maku Guest

    I am using Parallels Plesk Panel 9.5.4

    I am using one (1) IP address to host three (3) Domains.

    Everything is working fine except for the mail system. Whenever I check the settings thru mxtoolbox.com this error shows up

    220 expertsonlive.com.ar ESMTP Postfix
    Reverse DNS FAILED! This is a problem.

    0 seconds - Good on Connection time
    Not an open relay.
    0.874 seconds - Good on Transaction time

    Session Transcript:
    HELO please-read-policy.mxtoolbox.com
    250 expertsonlive.com.ar [140 ms]
    MAIL FROM: <supertool@mxtoolbox.com>
    250 2.1.0 Ok [156 ms]
    RCPT TO: <test@example.com>
    450 4.7.1 Client host rejected: cannot find your hostname, [] [140 ms]
    221 2.0.0 Bye [140 ms]

    What should I do? I have tried searching for answers for almost 12 hours to no avail. I still don't get the PTR fix. I tried removing the PTR and still to no avail.
  2. IgorG

    IgorG Forums Analyst Staff Member

    Oct 27, 2009
    Likes Received:
    Novosibirsk, Russia
    Are you sure that hostname expertsonlive.com.ar is correctly configured?

    For example:

    But no PTR record for this IP:

  3. Maku

    Maku Guest

    I have set a PTR in the DNS Settings. Here is my DNS Settings for the main domain.


    I am still wondering why the PTR doesnt work.