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Hexamail Guard is a server based software antispam filter for the Windows and Linux platforms. Acting as a gateway at the SMTP level or as a plugin for Microsoft Exchange Server, it supports most common anti spam filtering techniques including: *Bayesian pattern matching *Keyword/String/Expression *Header checks *DNS based blocklists *URL blocklists *Image analysis *Hosted image blocking *Sender analysis using neural network *Cloaking/Phishing detection *Challenge-Response *Blacklisting *User-configurable whitelists *Automatic Internet updates to blocking features *Honeypot Matching *Grey Listing *IP Location Detection (geolocation detection of clients) *Detection of Spam NDRs *Domain Keys *Sender Policy Framework *Optional antivirus scanning In addition it supports external POP3 and IMAP account downloading and filtering, a spam quarantine with multiple options for processing including: listing, forwarding, blocking, marking/tagging and deletion. Users can review their own spam through a web-based quarantine view. ==External links== *(Hexamail Guard web site ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hexamail Guard」の詳細全文を読む スポンサード リンク
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