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From Karsten Br├Ąckelmann <>
Subject Re: Looking for a "How To" to build Spamassassin+ClamAV mail filter
Date Thu, 16 Sep 2010 23:51:03 GMT
On Thu, 2010-09-16 at 16:29 -0700, IT_Architect wrote:
> We currently have this combination as part of our control panel with Exim,
> SpamAssassin, and ClamAV.  I would like to be able to offer this as an
> e-mail scrubbing service that would allow the customer to register only his
> domain.  Then he would make his lowest-cost MX our server.  We would bring

Cost? You mean the MX priority (as seen in host -t MX)?

> in his e-mails, filter out the spam and viruses, and send them to his
> in-house mail server at the higher cost MX.  Perhaps there is already a
> product like that, that I don't know about.

While the question as I understand it is not a SA question, and doesn't
match the Subject either...

This oh-so-simple scheme won't work. Spammers give a rats ass about MX
priorities. That is, unless they actively target higher numbered MXs, in
the hope they are less protected.

(The latter, coincidentally, being exactly what you just proposed, no?
Highest numbered MX on-site, while lower will do the filtering.)

char *t="\10pse\0r\0dtu\0.@ghno\x4e\xc8\x79\xf4\xab\x51\x8a\x10\xf4\xf4\xc4";
main(){ char h,m=h=*t++,*x=t+2*h,c,i,l=*x,s=0; for (i=0;i<l;i++){ i%8? c<<=1:
(c=*++x); c&128 && (s+=h); if (!(h>>=1)||!t[s+h]){ putchar(t[s]);h=m;s=0;

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