Effective built-in spam protection is achieved with PDM Business Email's structured, multi-layer spam prevention strategy. The PDM Business Email antispam technologies allow for customized levels of protection with flexible configurations on multiple antispam processes, including:

• SpamAssassin-based pattern matching engine
• Greylisting
• Sender Policy Framework (SPF)
• DomainKeys / DKIM
• Custom headers
• Bayesian filtering
• Reverse Domain Name Server (DNS)
• Real-Time Blacklist (RBL)
• Blacklist/Whitelist
• SMTP blocking
• Per-user spam weighting
• Distributed SpamAssassin support

The PDM Business Email spam blocking technologies work together to achieve 97% protection with exceptionally low false-positives while safeguarding against additional email threats by offering antivirus technology from ClamAV at no additional charge.