• fully compatible with any SMTP mail server
• routes mail on a per-domain basis
• per recipient/host whitelists and blacklists
• SMTP and LDAP/Active Directory callout for e-mail address validation
• temporary storage with retries in case of final server failure
• outgoing load balancing and/or failover

• SpamAssassin base ruleset and additional rules
• Bayesian controls, with auto-learn
• RBL checks
• Checksum protocols such as Razor, DCC, Pyzor
• URL RBLs
• SPF checks

• ClamAV scanning engine with automatic updates
• File type and file name access lists
• detection of potentially dangerous content

• complete configuration of filtered domains, with forwarding and preferences (languages, templates, user authentication, …)
• configuration of the base system (network, proxies, …)
• access to all users' configurations and quarantine
• full real-time spam quarantine access
• full real-time blocked content access (virus and dangerous content)
• Anti-Spam/Anti-virus/Content protection policy configuration
• advanced administration access list, so you can delegate light administrative access to other people, such as a hotline for example
• monitoring of the whole MailCleaner filter farm
• access to all logs
• mail queue access and control

• Authenticator connectors so your users won't have to remember another credential
  • IMAP/POP3 connector (to authenticate against a POP3 or IMAP server)
  • LDAP / Active Directory (to authenticate against an external LDAP, Exchange/Active Directory or Lotus server)
  • Radius
  • MySQL
  • Local (users' credentials are stored on the MailCleaner server)
  • Tequila (Tequila)
• Full access to their quarantine, with message release and analysis options
• per e-mail address configuration options, such as delivery mode (tag, quarantine, drop) and periodic summaries.

• support for almost any x86 compatible hardware
• automatic software RAID generation

and much more…