From: Robin Lynn Frank (no email)
Date: Wed Dec 01 2004 - 12:18:38 EST
On Wed, 2004-12-01 at 08:57, Paul Gardiner wrote:
>
> > Out of curiosity, what exactly are you trying to use to bypass on?
>
> I'm intending to introduce a "before queue" spam filter (probably using spampd).
> I want to reject the spam using the header_checks facility (assuming that the reject
> will work its way back through postfix, without turning into a bounce, which it
> looks as though it will). But I have some email coming in via fetchmail, and I
> don't want to reject that, because it will just mount up on my ISP's POP server.
> I'm happy to have that come in and keep it in separate mail boxes.
>
> > Since
> > all headers can be faked by a sender, there isn't much left in the
> > headers to trust.
>
> That worries me a bit, but I think I'm ok. If someone fakes a positive Spam
> header, then they deserve to have the email rejected. And faking of the header
> generated by fetchmail is unlikely.
>
> Thanks for your interest. I need all the help I can get.
>
> Cheers,
> Paul.
First, before queue spam filtering is good only with low volume sites or
with a spam filter that is really fast.
Second, man fetchmail shows the parameters necessary *not* to bounce
rejected mail. It also clearly states that mail rejected with a 553
will never be bounced by fetchmail. Although the 553 might be
unorthodox, it will guarantee fetchmail won't bounce rejections if you
can't achieve this any other way.
Third, why would rejecting mail cause mail to "mount up" on your ISP's
pop3?
-- /"\ ASCII RIBBON Robin Lynn Frank \ / CAMPAIGN Director of Operations X AGAINST Paradigm-Omega, LLC / \ HTML MAIL http://www.paradigm-omega.com/ ===================================================================== Spambots visit http://paradigm-omega.net/cgi-bin/custmail.cgi ===================================================================== No cures for cancer HIV or Alzheimer's, but lots for erectile dysfunction.
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