Distributed Checksum Clearinghouse, a.k.a. DCC is an anti-spam content filter, that works by comparing checksums of received mail, to recognize (and possibly block) unsollicited bulk e-mail. At DevZero.nl, over 50% of the SPAM we receive, is found with DCC, and there are very few false positives. DCC has been around for more than 10 years, but unfortunately, its license does not comply with the DFSG and it was removed from Debian in 2008.
Debian.dev-zero.nl has carried a Debian package for DCC since it was founded, but it hasn’t been updated in quite a while. The version that was in the archive (1.3.102) dated from February 2009. The latest version, that was released on November 9, 2010 is 1.3.134, and this version was packaged and uploaded to lenny-custom today.
As usual, both i386 and amd64 packages are available. A small warning: the packages have not been tested extensively, but I run them in production, so any problems that arise, I will fix.
