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Distributed Checksum Clearinghouse - Spam detection and filtering package

The DCC or Distributed Checksum Clearinghouse is a system of clients and servers that collects and counts checksums related to about 1,000,000 mail messages per day. The counts are used by SMTP servers and mail user agents to detect, reject or filter spam. DCC servers exchange or "flood" common checksums (which include values that are constant across common variations in spam, including "personalizations").

A DCC server totals reports of checksums and answers queries about the total counts for individual checksums. Each recipient decides independently how to handle each bulk message. A DCC client reports and asks about the total counts for several different checksums for a mail message. If a message's total is higher than the threshold set by the client, a DCC client that is part of an SMTP server can log, discard, or reject the message. DCC clients that are parts of mail user agents can discard, file, or score messages based on their "bulkiness."



Obtaining

Web pagehttp://www.rhyolite.com/anti-spam/dcc/
Source tarballhttp://www.rhyolite.com/anti-spam/dcc/source/dcc-dccd.tar.Z
Version 1.2.49 (stable) released on 2004-05-30
Licensed under an X11-style license.
This is not a GNU package.

Documentation
User FAQ available in HTML format from http://www.dcc-servers.net/dcc/FAQ.html
Support contacts

Help List<dcc@rhyolite.com> http://www.rhyolite.com//mailman/listinfo/dcc
Developer List<dcc@rhyolite.com> http://www.rhyolite.com//mailman/listinfo/dcc
Bug List<dcc@rhyolite.com> http://www.rhyolite.com//mailman/listinfo/dcc

Project contacts

Maintainers
Developers
Sponsors
  • Rhyolite Software (http://www.rhyolite.com)

Related information

Interfacesdaemon
Programsdcc, dccproc, dccm, dccd, cdcc
Source languagesC, Shell script
Related programsSpaminator, Black Hole, Active Spam Killer, Splonk, Notespam, GNU sauce, Spam Assassin, NoSpam, Hldfilter

Entry information

License verified byJanet Casey <jcasey@gnu.org> on 2002-07-08
Entry compiled byJanet Casey <jcasey@gnu.org>

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