The main CommuniGate Pro subsystems include:
- Multi-Domain architecture (field-proven for over 120,000 domains per system), with multihoming and shared-IP configurations.
- Account concept, including Mailbox Storage, File Storage, Account Settings, and Account Information databases.
- Groups, Forwarders, , Aliases, and other Domain Objects.
- Meta-Directory with Local and Remote Units.
- LDAP access to Directory and Account databases.
- External Authentication mechanism for integration with 3rd party solutions.
- Radius services.
- Billing system with multiple per-Account Balances and reservations.
- Unified Message Queue processing.
- ESMTP and LMTP mail exchange services.