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The setup has mainly two sections:

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(1) Image Added

technical filters: shows the options for filtering at protocol level. Filtering is done before the server "sees" the real message.

(2) content based filters: is the area of content filtering. Filtering is done by various techniques, which check for known patterns in the e-mail. You may choose, whether detected spam should get rejected or get moved into the "Junk"-folder for instance.

Important: The options in area 1 and also the option for blocking executable attachments will teh technical filters area always reject messages (except greylisting, this only rejects temporary), if a message matches there (independantly of the settings in area 2the content filter section).

Spam protection through greylisting