From: Lyndon Nerenberg <lyndon@orthanc.ca>
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] need help with improving my spam filtering
Date: Tue, 17 Oct 2006 00:19:16 -0700 [thread overview]
Message-ID: <20061017001147.B47217@orthanc.ca> (raw)
In-Reply-To: <5e914ebc24d412ce20916a8924820c18@quintile.net>
> The vast majority of soam I get these days is from spam virus infected
> machines on DSL lines in the USA (sorry but it true).
Why apologize for their crud???
> I was considering adding features to smtpd and ratfs to allow regexes
> so I could add rules for DSL lines. Most ISPs seem to use a fixed format for
> the reverse IP addresses for their DSL accounts - though each ISP has its
> own unique format.
I really don't think this will work. The physical source of spam is way
too mobile for anyone (or thing) to track. But the content is still
amenable to being smacked by bayes-like tools. Although the bastards are
getting better -- the last couple of months have seen a wee bit more crud
get past the filters. But we still win overall.
Anyway ... simple ingress filtering doesn't work. Its better to
concentrate on writing better algorithms that will smack this crud down
while it still lives in the swamps.
--lyndon
next prev parent reply other threads:[~2006-10-17 7:19 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-15 15:07 Robert Raschke
2006-10-15 15:19 ` andrey mirtchovski
2006-10-15 15:36 ` Russ Cox
2006-10-15 15:41 ` andrey mirtchovski
2006-10-15 15:39 ` Heiko Dudzus
2006-10-15 22:21 ` Steve Simon
2006-10-17 7:19 ` Lyndon Nerenberg [this message]
2006-10-17 7:56 ` Steve Simon
2006-10-17 14:55 ` Heiko Dudzus
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20061017001147.B47217@orthanc.ca \
--to=lyndon@orthanc.ca \
--cc=9fans@cse.psu.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).