2007-06-06 16:38:53 +00:00
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Spamd is a fake sendmail(8)-like daemon which rejects false mail. It is
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designed to be very efficient so that it does not slow down the receiving
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machine.
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2003-09-29 23:01:21 +00:00
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2007-06-06 16:38:53 +00:00
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spamd considers sending hosts to be of three types:
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2003-09-29 23:01:21 +00:00
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2007-06-06 16:38:53 +00:00
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blacklisted hosts are redirected to spamd and tarpitted i.e. they are
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communicated with very slowly to consume the sender's resources. Mail is
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rejected with either a 450 or 550 error message. A blacklisted host will not
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be allowed to talk to a real mail server.
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whitelisted hosts do not talk to spamd. Their connections are instead sent to
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a real mail server, such as sendmail(8).
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greylisted hosts are redirected to spamd, but spamd has not yet decided if
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they are likely spammers. They are given a temporary failure message by spamd
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when they try to deliver mail.
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2014-04-11 08:54:49 +00:00
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WWW: http://freebsdspamd.sourceforge.net/
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