Halting crossposting of messages

Cornelius Krasel krasel at wpxx02.toxi.uni-wuerzburg.de
Wed Aug 27 05:47:07 EST 1997


BIOSCI Administrator (biosci-help at NET.BIO.NET) wrote:
> In developing our spam filtering software, we have come to realize
> that continuing to allow crossposting of messages to newsgroups
> outside of bionet considerably complicates our task.  In the interest
> of expediting the implementing of spam filtering, therefore, we will
> stop allowing crossposting (at least temporarily).  

If I understand correctly, spam will be recognized by searching for
multiple newsgroups in the Newsgroups: line.

Unfortunately, most of the spam posted uses more sophisticated software
which puts only a single newsgroup in the Newsgroups: line. Three
examples from today's bionet.general:

Message-ID: <199708270054.RAA17519 at net.bio.net>
From: powertools at cybertools.net
Newsgroups: bionet.general
Subject: Power Tools For Webmasters
Date: 26 Aug 1997 17:54:56 -0700
Lines: 49
Organization: BIOSCI International Newsgroups for Molecular Biology
Sender: daemon at net.bio.net
Distribution: world
NNTP-Posting-Host: net.bio.net

Message-ID: <m0x3ZZ9-00043sC at systemy.systemy.it>
From: Cloaked0711 at aol.com
Newsgroups: bionet.general
Subject: **EXPLODE Your Business .. NOW!!**
Date: 26 Aug 1997 21:21:15 -0700
Lines: 473
Organization: BIOSCI International Newsgroups for Molecular Biology
Sender: daemon at net.bio.net
Distribution: world
NNTP-Posting-Host: net.bio.net

Message-ID: <199708270442.XAA17327 at quick.we-deliver.net>
From: success at t-1net.com
Newsgroups: bionet.general
Subject: Your cash will arrive Friday
Date: 26 Aug 1997 21:43:45 -0700
Lines: 102
Organization: BIOSCI International Newsgroups for Molecular Biology
Sender: daemon at net.bio.net
Distribution: world
NNTP-Posting-Host: net.bio.net

It is surprising to see that all of this stuff is actually posted via
some kind of gateway at net.bio.net. Therefore, one of my suggestions
would be that only a subscriber of a list may actually post to this
list through net.bio.net. (I.e. filter From: lines.) People who use
NNTP access to read bionet will likely be able to post via NNTP as well.

My second suggestion would be to ask some knowledgeable for cancel
software instead of developing it yourself. Chris Lewis might be the
person you are looking for. Maybe you could also persuade him to
watch the bionet hierarchy (maybe he already does, but I don't think
so).

While I am usually not crossposting between the bionet hierarchy and
others, my understanding is that other people do.

--Cornelius.

-- 
/* Cornelius Krasel, U Wuerzburg, Dept. of Pharmacology, Versbacher Str. 9 */
/* D-97078 Wuerzburg, Germany   email: phak004 at rzbox.uni-wuerzburg.de  SP3 */
/* "Science is the game we play with God to find out what His rules are."  */



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