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  1. #1
    Join Date
    Jan 2002
    Location
    Norfolk, UK
    Posts
    56

    Spamcannibal and PTR

    Has anyone here dealt with the Spamcannibal services?

    My server is with Hetzner and according to http://www.spamcannibal.org/cannibal.cgi inder IP lookup, I get this message:

    Code:
    Click for WhoisIP: 85.xxx.xxx.xxx  DE  
      static.85-xxx-xxx-xxx.clients.your-server.de
       Germany 
    
    policy violation, unacceptable generic PTR record
    From what I can see, my EXIM4 and BIND9 settings looks fine.

    What else have I missed to resolve this issue?

    Thanks,

    Tony
    - Tony Sutton
    - My Ford Focus ST170 car | My car's Dashcam Videos

  2. #2
    Join Date
    Jan 2008
    Location
    Jax, FL
    Posts
    2,707
    Spam Cannibal refuses to delist anyone who has a PTR record such as yours -- They consider reverse in the form of:

    123-45-67-89.static.reverse.domain.com

    To be generic. What they want you to do is edit the reverse record on the IP to match that of your hostname, etc etc.
    Daniel | Server Complete, LLC
    Windows VPS // Dedicated Servers // Backup Services
    Wholly owned hardware and self operated network (AS19531) in Jacksonville, FL

  3. #3
    Join Date
    Nov 2001
    Location
    Vancouver
    Posts
    2,416
    Not just Spam Cannibal: Many mail servers will reject mail sent from SMTP servers that do not have a PTR which resolves to the hostname of the sending mail server. Some may outright reject such mail, while others may use a no-match condition (which would occur with a "generic" PTR record) to raise whatever scoring system / level of distrust and that may put the conversation over the edge and force a rejection.
    “Even those who arrange and design shrubberies are under
    considerable economic stress at this period in history.”

  4. #4
    Join Date
    Feb 2004
    Location
    Bay Area, CA
    Posts
    521
    I once added Spam Cannibal to my RBL mix. Within only a day or 2 I started getting complaints for false positives and started noticing them myself immediately. Removed them and all is well.

    I think Spam Cannibal is just very ruthless in what they list and has a VERY high false positive rate. Never had one report of false positives using Spamhaus, SpamCop, and some other popular RBLs....

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