SMC anti-spam milter 1.7

SMC non-context E-mail filter - is an software application designed to significantly reduce the amount of SPAM/UCE (junk-mail) you receive. SMC uses a dynamic local and DNS based remote "whitelists" (for known/trusted senders), DNS based "blacklists" (for undesired senders), and an original "autoauthentication" system (for unknown, but legitimate senders). In additional SMC has a set of useful features which allows to preserve mail recipients from dangerous message attachments, HTML includes. SMC is an Sendmail milter (plugin), which stops the junk-mail without receiving one. SMC uses 3 original algorithms, one of which is "Check relay by NS" simulates a dynamical whitelist and will always accept the messages from mail systems satisfying to following conditions: 1. Mail domain name (the host part of the senders e-mail address) must have an MX records; 2. Mail domain name and the connection host address must be resolved; 3. Connection host must be listed at the one of nameservers which hold the senders mail domain name. The second from the developed algorithms is a "check delays" algorithm which is based on statistical check of delivery delays, generated by a [tempfail] return code, that allows to exclude a direct receiving of a mail, which not passed through the standard mail server. NOTE: Using this feature the delivery of the mail from unknown, but legitimate senders will be delayed for a count of 10-minutes checks, which setted by the "maxcount" configuration parameter. And the third of original algorithms is "auto-authentication" algorithm: The sender of a "mail contact" (sender-recipient pair) means as authenticated (whitelisted) if the filters statistics module has registered the both of a sended forward (request) and a recieved backward (reply) messages of this contact. The messages from the such authenticated senders will never be delayed by the previous "check delay" algorithm. Whats New in This Release: - CLOSE_WAIT problems have been solved (a critical bug). - There is a critical bugfix to prevent DNS storms. - All of the resolver functions use the local resolver context. - Automake and autoconf support have been added..

Requirements:	No special requirements
Platforms:	Linux
Keyword:	Anti-spam,  Antispam,  Communications,  Dns,  Email,  Mail,  Milter,  Senders,  Sendmail,  Significantly,  Smc
Users rating:	0/10