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If a message survives the initial SMTP conversation, Alligate next applies a sophisticated set of user defined rules and scoring
systems to further weed out unwanted email. Before a message is accepted and approved for relay to your mail server, you have
numerous options for reliably identifying and rejecting the message if it meets the levels you have defined. Unlike most mail server
integrated anti-spam solutions, Alligate allows you to simply refuse the message with a standard SMTP 550 error.
Envelope Analysis - Alligate records every aspect of the
envelope conversation and allows you to use the results of the
envelope analysis as part of the overall testing process.
Header Analysis - Alligate examines the header to ensure it is
syntactically correct. Every element is checked, and you can
define penalty points that are applied when Alligate finds
Body Analysis - Alligate allows you to define complex rules
using regular expressions to identify specific patterns. While this
is not designed to do deep intensive scanning, it is still an
effective tool, especially for prolific spam campaigns that use
Whitelisting Options - Numerous options are available for
whitelisting addresses, domains, as well as exclusions from
other checks like Greylisting..
Counterweighting Options - Negative test points can be
assigned based on header or message body contents to help
eliminate false positives on spammy looking messages.
Automatic Attack Detection - Alligate watches constantly for all
kinds of attacks or abuses and will kick into action within
seconds when one occurs.
Automatic Backscatter Protection - Alligate tracks NDR activity
to each user, and when a backscatter overload is detected,
Alligate refuses further NDR messages until the problem abates.
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