Re: How do fix a good solution against spam..

From: Slawek (sgp_at_telsatgp.com.pl)
Date: 05/14/04

  • Next message: Ruben de Groot: "Re: How do fix a good solution against spam.." 
    To: <freebsd-isp@freebsd.org>, <freebsd-security@freebsd.org>
Date: Fri, 14 May 2004 10:10:18 +0200

    Hello!
    In message to "Marian Hettwer" <Mh@kernel32.de> sent Thu, 13 May 2004 22:21:44
    +0100 you wrote:

    >>> Not only it's way faster than perl based messagewall, amavisd and
    >>> mailscanner etc but it also has neat stuff like making connections
    >>> back to the sender's MX checking for validity of the sender's email.
    >>
    >> This Feature sounds interesting. How is it actually called in exim ?
    >> I'd like to check the exim docu to see some details, because it really
    >> sounds interesting.
    >>
    >> Could you provide me with some keywords to search for ?

     TB> In Exim you're looking for sender callout verification.

     TB> http://www.exim.org/exim-html-4.30/doc/html/spec_38.html#SECT38.21

     TB> It's pretty trivial to turn on, and in my experience works well.

    One should be careful with source address checking as it may block mails in
    e-mail discussion lists when source e-mail address is nonexistent. Using
    things like "NO_SPAM" or "DELETE_THIS" in e-mail address is common (and
    justified) in discussion lists. 

    -- 
Slawomir Piotrowski
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