- Multiple email addresses per user
- Multiple domains
- User groups
- Email aliases
- Moderated/Unmoderated mailing lists
- Public/Shared folders
- Out of Office messages
- Message filters
- Delegation
- Services: POP3, SMTP, IMAP, NNTP, LDAP, HTTP
- Domain Footers with variable fields
- Manage Spam whitelists in MS Outlook
- Request delivery receipt in MS Outlook