Whitelisting IPs for Greylisting
Greylisting (灰名單)
Out of the box SpamAssassin
Custom spam weights
Outbound spam checking and blocking
Per-domain hosting accunt spam weighting and actions
Reverse DNS checks
Bayesian filtering
RBL listing detection (黑名單)
SPF record checking (寄件者政策架構 記錄)
Advanced domain and user content filtering
Automatic internal spammer detection
Rank: 
垃圾及病毒電郵功能:
Whitelisting IPs for Greylisting
