Spam Assassin Detecting our emails as spam

Discussion in 'Site & Server Administration' started by ProductivePC, May 17, 2006.

0
  1. #1
    I have just set up Spam Assassin on our server.
    It is working very nicely however whenever we try to send an email from our own server to someone else on the same server, it gets picked up as spam.

    I am wondering if anyone here has experience with Spam Assassin and can help me fix the issues below as I don't know what they mean exactly.

    I have spam assassin set to detect at 8 points whether or not an email is spam. We are way over that because of the following reasons.

    What do I have to fix on our server to fix the 4 issues below?

    1. We are losing 3.4 points because of HELO_DYNAMIC_IPADDR.

    2. We are losing 2.6 points because of NO_DNS_FOR_FROM.

    3. We are losing 2.0 points because of RCVD_IN_SORBS_DUL.

    4. We are losing 1.7 points because of RCVD_IN_NJABL_DUL.


    Here is a standard header from Spam Assassin that we get when we sent each other email.
    
 3.4 HELO_DYNAMIC_IPADDR    Relay HELO'd using suspicious hostname (IP addr1)
 0.1 HTML_TAG_EXIST_TBODY   BODY: HTML has "tbody" tag
 0.7 MIME_HTML_MOSTLY       BODY: Multipart message mostly text/html MIME
 0.0 HTML_MESSAGE           BODY: HTML included in message
 2.6 NO_DNS_FOR_FROM        DNS: Envelope sender has no MX or A DNS records
 2.0 RCVD_IN_SORBS_DUL      RBL: SORBS: sent directly from dynamic IP address
                            [68.56.175.199 listed in dnsbl.sorbs.net]
 1.7 RCVD_IN_NJABL_DUL      RBL: NJABL: dialup sender did non-local SMTP
                            [68.56.175.199 listed in combined.njabl.org]
-0.2 AWL                    AWL: From: address is in the auto white-list
    Code (markup):
    Thanks for any help with this.

    Wayne
     
    ProductivePC, May 17, 2006 IP
  2. DanInManchester

    DanInManchester Active Member

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    #2
    I had a similar problem and it can be a nightmare although it depends on your situation. Essentially it looks like you are using smtp server that isn't asociated with your domain name.

    If you have a domain name with a hosting provider make sure you use their SMTP server that way when a spam filter resolves domain name and IP address they will match.

    For example I use smtp.dbnetsolutions.co.uk for
     
    DanInManchester, May 17, 2006 IP
  3. ProductivePC

    ProductivePC Peon

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    #3
    We own the server.

    It sounds like you are talking about Reverse DNS.

    Our server has two IP's.

    The 1st IP is for the server.
    The 2nd IP (on the same machine) is for our mail software.

    Is that causing a conflict?

    Our mailing server would be
    SMTP: mail.spectacularstuff.com
    Email:

    So I am not sure what the issue is.... What about the other stuff?

    Wayne
     
    ProductivePC, May 17, 2006 IP
  4. obenix

    obenix Eats an apple a day......

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    #4
    obenix, May 17, 2006 IP
  5. ProductivePC

    ProductivePC Peon

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    #5
    Wow... that tool is cool. That is not my IP but I am presuming the one of the person sending the email.

    That may explain the other two. I have found a few other things.

    1. I found an email list for spam assassin: (It is on the other computer. As soon as I get there I will post the URL)

    2. I found explanations for all of Spam Assassins detections:
    http://spamassassin.apache.org/tests_3_1_x.html

    That is all I have found.

    Wayne
     
    ProductivePC, May 17, 2006 IP