Postgrey - Problems with Mail after upgrade

  • Hello,


    I updated the Postgrey plugin for the current version auf i-MSCP.


    Since them I'm having problems with e-mails to freemail accounts.
    After 3-5 days I'm getting this error message:


    Nemesis ESMTP Service not available 554-No SMTP


    service 554-Bad DNS PTR resource record.


    I checked the reverse entry at my server. This is fine. My provider recommends me too
    to check my mail system. I doesn't made any other changes than this update.


    Any idea where I should check/wich configuration is wrong?


    Best regards

  • Hello,


    Do you have checked the full DNS Health? Try https://intodns.com/ and give us feedback about DNS, Reverse PTR-Record, MX-Records,...


    Your error messages are very expressive and point out to a DNS misconfiguration!


    Best regards.

    Support Infos: I-MSCP Version: 1.5.x / Distro: Debian Stretch / PHP: 7.1.27 - FPM / I-MSCP Plugins: Let´s Encrypt + PHPSwitcher (latest Versions)

  • Hello,


    There is some MX Record difference that doesn´t match. (https://mxtoolbox.com/domain/e-zafiro.com/) -

    Code
    1. Reverse DNS does not match SMTP Banner


    dns-mismatch.png


    This names should be the same! So check again your Records.


    GMX and other Freemail Hoster doesn´t like that and for there it looks spammy!


    Best regards.

    Support Infos: I-MSCP Version: 1.5.x / Distro: Debian Stretch / PHP: 7.1.27 - FPM / I-MSCP Plugins: Let´s Encrypt + PHPSwitcher (latest Versions)