Key Features of MailScan for SMTP Servers Web Based Administration Real Time Virus Scanning at the Mail Gateway Attachment Filtering SMTP Transparent Proxy Real Time Content Scanning Advanced Anti-Spam and Anti Phishing Non Intrusive Learning Pattern NILP Greylisting Blocking Image Spam Autogenerated Spam Whitelist Clustering Relay Control Comprehensive Attachment and eMail Archiving Compression and Decompressiong SMTP Control Automated Hourly Updates Virus Outbreak Alerts Multi Domain Support User Mail Size Restriction and Mail Parking LDAP and POP3 Authentication SMTP Authentication Customized Disclaimers Extensive Reports