TMDA (Tagged Message Delivery Agent) is an OSI certified software application designed to significantly reduce the amount of SPAM/UCE (junk-mail) you receive. TMDA combines a "whitelist" (for known/trusted senders), a "blacklist" (for undesired senders), and a cryptographically enhanced confirmation system (for unknown, but legitimate senders). TMDA strives to be more effectual, yet less time-consuming than traditional filters. This port belongs in net-mail category. p.s. I'd appreciate a CVS account so that I could maintain this port and add a few new ones. You can email me at agenkin@thpoon.com.
The ebuild is downloadable from the following URL: http://cdf.toronto.edu/~agenkin/net-mail.tmda.tar.gz