Qmail-spam

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* Chris Hardie has updated his qmail [http://www.chrishardie.com/tech/qmail/qmail-antispam.html anti-spam howto]
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Merged with [[Spam_Prevention]]
 
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* Dan's [http://www.qmail.org/rbl/ rblsmtpd] blocks spam using the RBL and other DNS-based lists. Because of the size of the RSS zone, they have removed the necessary TXT records that rblsmtpd relies on.
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* Alan Curry has a patch to [http://www.qmail.org/ucspi-rss.diff rblsmtpd to make it work with A records].
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* David Jonas has a patch to rblsmtpd to let you [http://www.linuxpenguins.com/forum/viewtopic.php?p=6 ignore certain A record] responses from the bl lookup.
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* Russell Nelson has a pair of programs to help [http://www.qmail.org/spam-filter keep spam out of your mailbox.
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* Jason R. Mastaler has improved [http://tmda.sourceforge.net/ TMDA], an anti-spam system.
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* Lionel Widdifield wrote [http://www.fmp.com/downloads/qmail-antispam4.tar.gz wrote an anti-spam patch]. 
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* [http://www.unixpimps.org/software/qregex/ qregex] provides full regexp matching on envelope addresses.</a>With REs (Regular Expresions) it becomes quite easy to filter out email addresses that contain invalid characters or simply aren't a real address. 
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* Andrew St. Jean has [http://www.arda.homeunix.net/store/qmail/ added] case insensitive pattern matching and logging when a match is found.
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* Chris Johnson has a patch to implement [http://www.palomine.net/qmail/tarpit.html tarpitting] in qmail-smtpd. If you don't know what tarpitting is, it's the practice of inserting a small sleep in an SMTP session for each RCPT TO after some set number of RCPT TOs. The idea is to thwart spammers who would hand your SMTP server a single message with a long list of RCPT TOs.
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* Nagy Balazs wrote a patch to ensure that the domain name on the [http://js.hu/package/qmail/index.html envelope sender is a valid DNS name].  This is not terribly effective against spammers, but I list it here because some people want it.
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* Jon Rust wrote [http://jon.rusts.net/qrblcheck.c qrblcheck], which reads a message on stdin, grabs the IP address from the Received lines and checks it against five different DNS-based spamlists.
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* Jay Soffian has a qmail-queue replacement to [http://www.qmail.org/qqrbl filter against DNS spamlists. It uses Bruce Guenter's QMAILQUEUE patch. Matching email is not rejected, but instead an X-RBL: header is added, for filtering at the delivery layer.
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* O'Shaughnessy Evans has a set of shell scripts that comprise a spam-filtering system called [http://isle.wumpus.org/cgi-bin/pikie?SpamRule spamrule].
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* Ask Bj&oslash;rn Hansen wrote [http://develooper.com/code/qpsmtpd/ qpsmtpd], a smtp server with filtering tools.  It's written in perl.
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* Erwin Hoffman's [http://www.fehcom.de/qmail/spamcontrol.html SPAMCONTROL] combines many spam control features.  Includes SMTP Auth with CRAM-MD5 support.
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* EnderUNIX Team wrote [http://www.enderunix.org/spamguard spamGuard], which scans your log files for "too much" email from a particular user, and adds them to badmailfrom.
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* Russell Nelson has a patch to [http://www.qmail.org/qmail-smtpd-relay-reject reject relay probes] generated by so-called anti-spammers. These relay probes have '!', '%' and '@'in the local (username) part of the address.
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* Dale Woolridge, James Law, and Moto Kawasaki's [http://spamthrottle.qmail.ca/ spam throttle] patch provides a method to rate limit/stutter spam (message throughput) via a highly parameterized control interface.  As of release 2.01, tcpserver is no longer a strict requirement.
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* James Grinter has instructions on [http://www.gbnet.net/~jrg/qmail/ifspamh using SpamAssassin]. It's a script that runs from a .qmail file.
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* Chris Kennedy has written the [http://sourceforge.net/projects/blackholespam/ BlackHole] spam/virus filter.
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* Noel Mistula wrote [http://ngm.id.au/checkhab checkhab], which checks for HTML, attachments, and binaries in email, and blocks them.
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* Gerrit Pape wrote [http://smarden.org/qconfirm/ qconfirm], a delivery confirmation process for a mail address.
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* Chris Johnson wrote [http://www.palomine.net/qdated/ qdated] to create and verify timestamped e-mail addresses.  These addresses expire after a user-configurable period of time; any mail sent to an expired address will bounce.
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* Roger Merchberger has some techniques to deal with [http://www.30below.com/~zmerch/qmail/ double-bouncing email].
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* [http://q-sorter.sourceforge.net q-sorter] sorts your email into separate inboxes.
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* [http://search.cpan.org/author/JRAFTERY/ Net::QMTP] - This perl module implements an object oriented interface to a Quick Mail Transfer Protocol (QMTP) client which enables a perl program to
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send email by QMTP.
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* Georg Lehner tells how to configure [http://www.magma.com.ni/~jorge/spamassassin.html Qmail with Spamassassin.
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* Jeffrey Clement wrote a time-limited email-address program called [http://jclement.ca/software/datedmail.py/ datedmail].
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* Luca Morettoni wrote [http://morettoni.net/qmail-rblchk.en.html qmail-rblchk], which checks the IP address in the Received: line of an email message on stdin against named DNSBLs.
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* Jean-Eudes ONFRAY wrote a [http://www.qmail.org/rhsbl.patch rhsbl patch[ for tcpserver. This lets you block or whitelist email based on the reverse-DNS hostname rather than IP.
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* Philip Gladstone wrote a delivery-time [http://pond.gladstonefamily.net/do-spf.pl SPF checker]. More on [http://spf.pobox.com SPF].
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* Christophe Saout wrote a [http://www.saout.de/misc/spf/ SPF checker] that runs inside qmail-smtpd and is written using the native dns and string functions that come with qmail.
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* Markus Stumpf has a patch for qmail-smtpd that [http://www.lamer.de/maex/creative/software/qmail/105-sober-g/ rejects W32/Sober-G] at the SMTP level.
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* Jay Soffian has modifies qmail-smtpd to [http://www.soffian.org/downloads/qmail/qmail-smtpd-doc.html fork/exec $RCPTCHECK] at the RCPT TO:</a>. $RCPTCHECK is run in the same environment as qmail-smtpd. Additionally $SENDER is set to the envelope from and $RECIPIENT is set to the envelope recipient (for the current rcpt to:). Based on the return code (exit value) of $RCPTCHECK, the rcpt to: address will either be accepted or rejected.
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Latest revision as of 10:38, 4 December 2006

Merged with Spam_Prevention

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