2005-05-28 11:56:27 +02:00
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Anti-Spam SMTP Proxy is a spam filter that sits on port 25 in front of your
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regular SMTP server (sendmail, postfix, qmail, etc).
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ASSP performs a number of configurable spam checks, and on detecting a spam
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message, provides an immediate 5xx SMTP error code back to the client.
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Non-spam messages are passed to your regular SMTP server for further
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2009-05-22 03:43:29 +02:00
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processing and delivery. ASSP includes SSL and IPv6 support. It is a single
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script with a web-based configuration tool.
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2005-05-28 11:56:27 +02:00
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ASSP offers:
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- a whitelist of known good senders
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- Bayesian checks on message headers and contents
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- recipient address validation using LDAP and RFC822 conformance
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- relay denial
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- HELO checking
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- SPF (Sender Policy Framework) checking
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- DNSBL (DNS Block List) checking using many DNSBL services
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2009-05-22 03:43:29 +02:00
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- various SMTP error modes detection
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2005-05-28 11:56:27 +02:00
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- Virus detection
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2009-05-22 03:43:29 +02:00
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and many other spam detection techniques.
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2005-05-28 11:56:27 +02:00
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WWW: http://assp.sourceforge.net/
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2009-05-22 03:43:29 +02:00
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WWW: http://opal.com/jr/freebsd/ports/mail/assp/
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