For the last 18 months, the DCC source has included a new version of the SpamAssassin DCC plugin. As far as I know, it is completely upward compatible. Besides a general clean up of the Perl source and a bunch of changes that should make DCC.pm faster and more robust, it includes a mechanism that reports message detected as spam by SpamAssassin to DCC with target counts of 'many'.
Two or three months ago a DCC installation started using that mechanism on its incoming 750K messages/day. The effect is to increase DCC target counts for messages considered spam by SpamAssassin to 'many'. That should have little effect on DCC installations that set DCC thresholds to values below 1000. 750K messages/day is too few to support certain conclusions, but judging from the DCC server graphs, it has noticable effects on the majority of other DCC installatios that use the DCC.pm default synonym of 9999999 for 'many'. That increased target count of 'many' can not only help other DCC installations, but also sites using the mechanism with the default DCC.pm threshold of 999999. For example, a message from an SMTP client (mail sender) at an IP address in a DNS blacklist (DNSBLs) can get a DCC target count of 'many'. A later copy received via an address not in a DNSBL can trigger a SpamAssassin+DCC rule. To try the mechanism, make a copy of your current DCC.pm file and install the DCC.pm file in your SpamAssassin installation from the misc directory of your DCC build/installation tree. (I would use a symbolic link.) If you have used /var/dcc/libexec/updatedcc, look in /var/dcc/build/dcc/misc/DCC.pm At worst, check the current DCC source tree at http://www.dcc-servers.net/dcc/dcc-tree/misc/DCC.pm Then set the DCC.pm parameter dcc_learn_score to whatever you use for the global SpamAssassin threshold or perhaps a little more. Depending on your SpamAssassin installation, you might then need to restart an SA deamon. Vernon Schryver [email protected] _______________________________________________ DCC mailing list [email protected] http://www.rhyolite.com/mailman/listinfo/dcc
