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  • Sender ID stamp unreliable ?

    I am fighting against spam so I have configured the Sender ID Filter + the IMF.
    In order to check the result I have also implemented the custom form to display Sender ID value in Outlook (http://msexchangeteam.com/archive/20...13/412487.aspx) - it works fine.

    Now I have got an obvious spam from the IP=161.116.75.17, FQDN="ub075017" (a non-sense, non-existent FQDN).

    I have expected from Sender ID filter to stamp it as "Non-existent Domain" (value 3), in which case IMF would have sent it to the junk mail folder.

    Instead Sender ID filter stamped it as 5 (=NONE =No Sender ID records are published for this domain), and so it did not get to the junk mail folder.

    My questions:

    a) Am I right to suppose that this issue is a malfunction of the Sender ID filter, or am I interpreting something wrong?

    b) Is there another antispam method - as a minimum measure - to reject mails of senders with invalid and/or non-existent FQDN (HELO name) ?

    Thanks in advance,

    petardo
    Last edited by petardo; 25th February 2009, 17:23.

  • #2
    Re: Sender ID stamp unreliable ?

    The built in antispam options on Exchange are very basic. If you want something more advanced to do DNS type things then you need to look at something like Vamsoft ORF.

    Simon.
    --
    Simon Butler
    Exchange MVP

    Blog: http://blog.sembee.co.uk/
    More Exchange Content: http://exchange.sembee.info/
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    Sembee is a registered trademark, used here with permission.

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    • #3
      Re: Sender ID stamp unreliable ?

      Originally posted by Sembee View Post
      The built in antispam options on Exchange are very basic. Simon.
      Thx. Rejecting non-existent domain is very basic - I would expexct. No way to configure?

      Comment


      • #4
        Re: Sender ID stamp unreliable ?

        That is actually quite advanced.
        I don't use SPF myself, I find it drops too much legitimate email.

        Simon.
        --
        Simon Butler
        Exchange MVP

        Blog: http://blog.sembee.co.uk/
        More Exchange Content: http://exchange.sembee.info/
        Exchange Resources List: http://exbpa.com/
        In the UK? Hire me: http://www.sembee.co.uk/

        Sembee is a registered trademark, used here with permission.

        Comment


        • #5
          Re: Sender ID stamp unreliable ?

          Thx for reply.
          I don't understand why sender id filter doesn't do the job.
          Never mind.

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