spamassassin block ndr
spamassassin block ndr thoughts for 12.31.1969
Spam filtering services offered by many retail isps, commercial online spam-filtering services (such as spamcop), mda-based procmail scripts, or packages like spamassassin, are all examples of on-network filtering. SpamAssassin puts its results into an X-line within the message header. Spamassassin is typically run on a mail delivery agent so that spam can be held and not downloaded to the user. While it is arithmetical in nature, spamassassin is not itself a bayesian filter, although bayesian filters can be included as spamassassin tests. Administrators can specify the tests to be used by their local spamassassin installations, can vary these tests for each user, and can even write their own tests using a basic syntax plus regular expressions. Spamassassin is a highly versatile and configurable spam filtering program that identifies spam by testing for certain predefined "fingerprints" and assigning arbitrary numerical scores where it finds them; messages that exceed a user-adjustable threshold score are then tagged as spam. Spamassassin: An open-source spam filtering system currently maintained by the apache software foundation, and used by many small-to-medium-size isps, online businesses, and end-users.
spamassassin block ndr
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