The plug-in can delete spam right on the server by headers, using a list of account settings. The accounts for filtering can be added manually or automatically for non-secure connections. The rest of messages are downloaded to email client for filtering by full content, and the messages with high spam ratio are moved to a special folder automatically.
The plug-in supports several complementary methods in addition to statistical algorithm: black and white lists of email addresses, anti-phishing filter, blocking spam by IP address of the sender (using DNSBL services), black and white Regexp-based rules. Several methods are used for filtering graphical spam: Blocking spam with inline images, linked to third-party web sites. Blocking the messages with animated GIF pictures in attachment. Blocking the messages by the type of attachment. The statistical classifier is optimized for blocking spam with a picture and some amount of unlinked text.
The plug-in is checking the domains from message text via list of selected URIBL services. The messages having blacklisted domains in text are classified as spam. The plug-in is integrated with SpamNet spam-fighting community. SniperSync is a TCP server, allowing AntispamSniper plug-ins to use the common whitelist of email addresses and common database of message descriptors. The different copies of plug-in in local network can use this common database via two-way synchronization with the SniperSync server.
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