Distributed Checksum Clearinghouse

Distributed Checksum Clearinghouse, in short DCC, is a system of clients and servers that collect and count checksums related to mail messages. The counts can be used by SMTP servers and mail user agents to detect and reject bulk mail.

DCC servers can exchange common checksums. The checksums include values that are "fuzzy", or constant across common variations in bulk messages.

What is new in this release:

• This version fixes the default Linux run levels and start-dccifd.

What is new in version 1.3.143:

• This version adds partial support for FreeBSD on ARM processors.

What is new in version 1.3.141:

• This version fixes several modest bugs and updates the copy of the SpamAssassin DCC.pm plugin.

What is new in version 1.3.135:

• Minor enhancements

What is new in version 1.3.128:

• Support for DNS whitelists.
• An example using dnswl.org is in the sample homedir/dcc_conf file.

What is new in version 1.3.103:

• A RedHat versus Debian error message from rcDCC was quieted.
• An error in libexec/fetch-testmsg-whitelist was fixed.

What is new in version 1.3.101:

• Groups of DNS blacklists that can be independently enabled in per-user whiteclnt files are supported.