what has procmail got over sendmail??

is there a way i have have a file call JunkMail that sendmail reads and if a
email address or a domain name is in there it will drop them??

Johnno


----- Original Message -----
From: "Volker Kuhlmann" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, January 27, 2002 11:16 AM
Subject: Re: SpamAssassin


> Has anyone got SpamAssassin to work with sendmail?? and is it any good??

I had a brief look at spamassassin and vipul's razor, but then decided not
to install them. The risk of loosing real mail seemed very high. Plus
installing all that perl rubbish looked like a mighty nightmare (no I am not
interested in having my system screwed by running some kind of
perl-do-it-all-screw-it-all program).

In general, it is impossible to block spam reliably. The higher your block
rate the higher your risk to loose real stuff. At a *very* rough guess
blocking >=80% starts to get dangerous.

The best start is to dump black-listed senders. This seems to catch approx
50%. For sendmail, add

FEATURE(dnsbl, nputs.orbz.org')dnl
FEATURE(dnsbl,elays.orbl.org')dnl
FEATURE(dnsbl,elays.ordb.org')dnl
FEATURE(dnsbl,elays.osirusoft.com')dnl
FEATURE(dnsbl,bs.dorkslayers.com')dnl
dnl costs money:
dnl FEATURE(dnsbl,ialups.mail-abuse.org')dnl
dnl FEATURE(dnsbl,lackholes.mail-abuse.org')dnl
dnl FEATURE(dnsbl,elays.mail-abuse.org')dnl

at the appropriate place. This will tell RBL's to get stuffed. It might
catch @xtra.co.nz and @ihug.co.nz as well, dunno, tell those guys to get a
real ISP instead and to stop supporting spammers.

Also tell the same to anyone sending from an IP which does not
reverse-resolve. This might catch some dial-up users for whom the ISP does
not supply reverse-mapping (are there any?).

I would very strongly suggest you use spambouncer (www.spambouncer.org) for
some months to get an idea what kind of rubbish gets in and how it's
filtered, and importantly, how and why those filters fail. Then you can get
more adventerous. I can supply some initial setup in case you use procmail
already (the spambouncer-supplied one is crap, the author doesn't care
fixing that).

> I have been looking in to a way of removing spam before i get spam :)))

Haven't we all. Cut down your expactations a few notches or you will be
disappointed.

Volker

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