Reverse IP check Plesk and Postfix?

Discussion in 'Plesk 10.x for Linux Issues, Fixes, How-To' started by BerndN, Jul 26, 2011.

  1. BerndN

    BerndN Kilo Poster

    Messages:
    28
    While I did search a bit my question would be if it's possible to reject/discard SMTP connections to postfix which have

    a) no FQDN associated with the IP address of the sender
    b) FQDN points to different HOST then HELO

    It would be great to have a solution for a). Better would be a & b ;)

    Ups: Plesk 10.3 and Centos 5.6
     
  2. 105547111

    105547111 Product Expert

    Messages:
    637
    The postfix manual for main.cf

    http://www.postfix.org/postconf.5.html

    This can help you configuring postfix. Also postfix has it's own support email lists which you can get advise on advanced configuration for postfix.

    Cheers.
     
  3. BerndN

    BerndN Kilo Poster

    Messages:
    28
    Just to verify. I can edit the main.cf without interfering with Plesk? I don't want to break the Plesk interface here.
     
  4. 105547111

    105547111 Product Expert

    Messages:
    637
    Save a copy of main.cf, you can always revert.

    Be aware plesk re-writes this, so once you have it finalized with all your changes, save a copy and check it time to time.

    As long as you don't start changing the plesk paths, it won't break.

    Make sure you /etc/init.d/postfix restart after your changes or they will not take effect.

    I have got whitelists running on mine from a source listing IPs used by ISPs, this helps you stop blacklisting your users using these addresses. I am not near a PC now (on my iPad), I can get you the details out of my main.cf for these. As long as your whitelisting runs first in the line, the RBLs won't kill off those addresses.

    Cheers,
     
  5. BerndN

    BerndN Kilo Poster

    Messages:
    28
    Thanks for the help and it would be nice to see some of your entries. And a lot of thanks for letting me know that indeed Plesk rewrites this as soon I assume as I change some settings of the Mail configuration.
     
  6. iori322d

    iori322d Bit Poster

    Messages:
    1
    Thanks

    Thanks for sharing the link on Reverse IP check Plesk and Postfix. can you tell me more about smtp_tls_protocols (default: !SSLv2)??? Thank you. :)
     

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