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</a> wrote an anti-spam patch.  Someone made some
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improvements to Lionel's patch, which Lindsay Haisley has <a
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href="http://www.fmp.com/downloads/qmail-antispam4.tar.gz">ported to qmail 1.03</a>.
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* <a name="200403290"><a
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href="http://www.unixpimps.org/software/qregex/">qregex</a> provides
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full regexp matching on envelope addresses.</a>With REs (Regular
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Expresions) it becomes quite easy to filter out email addresses that
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contain invalid characters or simply aren't a real address.  Andrew
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St. Jean has <a
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href="http://www.arda.homeunix.net/store/qmail/">added</a> case
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insensitive pattern matching and logging when a match is found.
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* <a
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href="http://www.qmail.org/cgi-bin/m/cjohnsona@apalomine.net">Chris
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Johnson</a> has a patch to implement <a
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href="http://www.palomine.net/qmail/tarpit.html">tarpitting</a> in
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qmail-smtpd. If you don't know what tarpitting is, it's the practice
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of inserting a small sleep in an SMTP session for each RCPT TO after
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some set number of RCPT TOs. The idea is to thwart spammers who would
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hand your SMTP server a single message with a long list of RCPT
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TOs.
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* Nagy Balazs wrote a patch to
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ensure that the domain name on the <a
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href="http://js.hu/package/qmail/index.html">envelope sender is a
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valid DNS name</a></a>.  This is not terribly effective against spammers,
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but I list it here because some people want it.
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* Jon Rust wrote <a
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href="http://jon.rusts.net/qrblcheck.c">qrblcheck</a></a>, which reads
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a message on stdin, grabs the IP address from the Received lines and
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checks it against five different DNS-based spamlists.
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* Jay Soffian has a qmail-queue
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replacement to <a href="qqrbl">filter against DNS spamlists.</a></a>.
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It uses Bruce Guenter's <a href="#qmailqueue">QMAILQUEUE</a> patch.
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Matching email is not rejected, but instead an X-RBL: header is added,
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for filtering at the delivery layer.
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* O'Shaughnessy Evans has a set of
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shell scripts that comprise a spam-filtering system called "<a
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href="http://isle.wumpus.org/cgi-bin/pikie?SpamRule">spamrule</a>".</a>
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* Ask Bj&oslash;rn Hansen wrote <a
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href="http://develooper.com/code/qpsmtpd/">qpsmtpd</a>, a smtp server
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with filtering tools</a>.  It's written in perl.
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* Erwin Hoffman's <a
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href="http://www.fehcom.de/qmail/spamcontrol.html">SPAMCONTROL</a>
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combines many spam control features</a>.  Includes SMTP Auth with
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CRAM-MD5 support.
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* EnderUNIX Team wrote <a
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href="http://www.enderunix.org/spamguard">spamGuard</a></a>, which
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scans your log files for "too much" email from a particular user, and
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adds them to badmailfrom.
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* Russell Nelson has a patch to <a
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href="qmail-smtpd-relay-reject">reject relay probes</a> generated by
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so-called anti-spammers.</a> These relay probes have '!', '%' and '@'
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in the local (username) part of the address.
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* Dale Woolridge, James Law, and
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Moto Kawasaki's <a href="http://spamthrottle.qmail.ca/">spam throttle</a></a>
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patch provides a method to rate limit/stutter spam (message throughput)
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via a highly parameterized control interface.  As of release 2.01,
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tcpserver is no longer a strict requirement.
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* James Grinter has instructions on
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<a href="http://www.gbnet.net/~jrg/qmail/ifspamh">using
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SpamAssassin</a></a>.  It's a script that runs from a .qmail file.
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* Chris Kennedy has written the
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<a
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href="http://sourceforge.net/projects/blackholespam/">BlackHole</a>
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spam/virus filter</a>.
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* Noel Mistula wrote <a
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href="http://ngm.id.au/checkhab">checkhab</a></a>, which checks
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for HTML, attachments, and binaries in email, and blocks them.
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* Gerrit Pape wrote <a
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href="http://smarden.org/qconfirm/">qconfirm</a></a>, a delivery
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confirmation process for a mail address.
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* Chris Johnson
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wrote <a href="http://www.palomine.net/qdated/">qdated</a></a> to
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create and verify timestamped e-mail addresses.  These addresses
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expire after a user-configurable period of time; any mail sent to an
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expired address will bounce.
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* Roger Merchberger has some
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techniques to deal with <a
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href="http://www.30below.com/~zmerch/qmail/">double-bouncing
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email</a></a>.
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* <a
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href="http://q-sorter.sourceforge.net">q-sorter</a> sorts your email
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into separate inboxes.</a>
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* <a
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href="http://search.cpan.org/author/JRAFTERY/">Net::QMTP</a> - This
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perl module implements an object oriented interface to a Quick Mail
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Transfer Protocol (QMTP) client</a> which enables a perl program to
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send email by QMTP.
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* Georg Lehner tells how to
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configure <a
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href="http://www.magma.com.ni/~jorge/spamassassin.html">Qmail with
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Spamassassin</a></a>.
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* Jeffrey Clement wrote a
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time-limited email-address program called <a
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href="http://jclement.ca/software/datedmail.py/">datedmail</a></a>.
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* Luca Morettoni wrote <a
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href="http://morettoni.net/qmail-rblchk.en.html">qmail-rblchk</a></a>,
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which checks the IP address in the Received: line of an email message
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on stdin against named DNSBLs.
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* Jean-Eudes ONFRAY wrote a <a
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href="rhsbl.patch">rhsbl patch</a> for tcpserver</a>.  This lets you
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block or whitelist email based on the reverse-DNS hostname rather than
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IP.
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* Philip Gladstone wrote a
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delivery-time <a href="http://pond.gladstonefamily.net/do-spf.pl">SPF
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checker</a>.</a> More on <a href="http://spf.pobox.com">SPF</a>.
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* Christophe Saout wrote a <a
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href="http://www.saout.de/misc/spf/">SPF checker</a></a> that runs
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inside qmail-smtpd and is written using the native dns and string
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functions that come with qmail.
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* Markus Stumpf has a patch for
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qmail-smtpd that <a
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href="http://www.lamer.de/maex/creative/software/qmail/105-sober-g/">rejects
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W32/Sober-G</a> at the SMTP level.</a>
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* Jay Soffian has modifies
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qmail-smtpd to <a
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href="http://www.soffian.org/downloads/qmail/qmail-smtpd-doc.html">fork/exec
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$RCPTCHECK</a> at the RCPT TO:</a>.  $RCPTCHECK is run in the same
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environment as qmail-smtpd. Additionally $SENDER is set to the
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envelope from and $RECIPIENT is set to the envelope recipient (for the
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current rcpt to:). Based on the return code (exit value) of
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$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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