Just the following line in the sendmail .mc file does the deed:

FEATURE(dnsbl,`rbl-plus.mail-abuse.org',`Rejected - see 
<http://www.mail-abuse.o
rg/rbl/> or call Ed at 650 801 7366')dnl

Besides that, we're also running Procmail Sanitizer and Spamassassin on 
the relay, they clean up the crap that gets past the blacklists. 
Altogether they make the spam killing machine remarkably capable, and it 
was dirt cheap. OpenBSD+1 cheap 1u case and a 850mhz PIII, 400m ram, it 
handles all the inbound crud without breaking a sweat. One of the more 
useful boxes on our network. Especially Procmail Sanitizer; not having to 
worry about the clueless being socially engineered into opening worms and 
such is an absolute must-most of them won't work on us anyway since we 
don't use LookOut, but they still often lock up boxes when they try to 
replicate and the expected LookOut Address Books aren't there or whatever. 
And of course locked boxes means calls from the clueless...

http://www.impsec.org/email-tools/procmail-security.html

http://www.spamassassin.org/

Regards,

Ed Hintz
Network Systems Administrator
Natus Medical Inc.
[EMAIL PROTECTED]



Alex Howansky <[EMAIL PROTECTED]> 
12/10/2002 08:26 PM

To
[EMAIL PROTECTED]
cc

Subject
Re: [gb-users] ADMIN: Re: [gb-users] BL question






> Rejected - see<http://www.mail-abuse.org/rbl/>or call Ed at 650 801 7366

Ha ha, great idea! Do you run a local copy of the list(s) with customized 
TXT
records, or do you have sendmail configured to send that static string for 
a
501?

> We average 100 blocks daily with an all time high of over 4000 in one 24
> hour period;

I see your 4000 and raise you 118,885. I think I've gotten four complaints 
of
false positives for 2002 so far. If that's fundamentally wrong, then I 
don't
want to be right. :)

-- 
Alex Howansky
Wankwood Associates
http://www.wankwood.com/

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