Can the DCC be used with SpamAssassin or other spam filters?
The DCC can be used with SpamAssassin as well as other spam and virus filters. Note that it is more efficient to arrange to use a DCC client daemon, dccm or dccifd, to mark passing mail and check X-DCC header lines in the filter than connect to dccifd on each message. It is even less desirable to start and run dccproc on each message. If the dccifd socket is present, SpamAssassin prefers to talk to dccifd instead of running dccproc. Some commercial virus and spam filters include DCC clients that query public DCC servers or DCC servers operated by the filter vendor and that “flood” or exchange bulk mail checksums with public servers. Reputable manufacturers of such devices operate their own DCC servers connected to global network of DCC servers instead of stealing and then selling the CPU cycles, network bandwidth, disk space, and, most important, human system administration efforts of the public DCC servers.
