Hexamail Guard
Hexamail Guard is a server-based software anti-spam 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 matching
- Header checks
- DNS-based blocklists
- URL blocklists
- Image analysis
- Hosted image blocking
- Sender analysis using neural networks
- Cloaking/phishing detection
- Challenge-response authentication
- Blacklisting
- User-configurable whitelists
- Automatic internet updates to blocking features
- Honeypot matching
- Greylisting
- IP location detection (geolocation detection of clients)
- Detection of spam NDRs
- DomainKeys
- 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
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