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From Karsten Br├Ąckelmann <>
Subject Re: Spamassasin as a gateway filter for Exchange
Date Wed, 19 May 2010 21:50:22 GMT
On Wed, 2010-05-19 at 23:34 +0200, Mikael Syska wrote:
> Yes, we are unfortunately one of the bad guess atm, and I want to
> change that ... so hopefully this will give Exchange users and idea
> how to fight it, if they are using this kind of setup.

Ugh. Well, good you *want* to change it. :)

> > > Not to highjack the thread, but there are also other things to consider.

> > Don't think you're hijacking the thread -- you just stated exactly, what
> > I mentioned in my previous post.
> Yes, and I was actually thinking of writing the post one of these
> days, but this seems to be the right time to open such question.
> Reading in the docs ... there seem to be a way, but not for me logical
> way of doing this. I I will need some hints, maybe I need to post to
> the postfix mailing list :-)

Yes! Now that you mention it... Just recalled a section in the Book of
Postfix [1], describing exactly this scenario. A frontend postfix with a
backend Exchange server, exclusively accepting mail for *valid*

I did not read that section, though just glimpsing at the first intro
paragraph suggests this is exactly it. Uses LDAP or something.

So, yeah, might want to poke the postfix list. The authors of the book
are hanging out there, too. And please leave some pointers and links
into postfix list archives here. :)


[1] Authors: Ralf Hildebrandt, Patrick Ben Koetter. This is the second,
    revised German edition, though. More recent than the English one.

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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