VPOP3 Enterprise includes all the features of VPOP3 Basic, plus:

• IMAP4 mail support as well as POP3, SMTP and Webmail
• Support for database (ODBC) links for the Global Address Book and Mailing Lists.
• Shared calendars & webmail address books
• SSL/TLS encryption can be used for users connecting to VPOP3. (VPOP3 Basic includes SSL/TLS support for VPOP3 connecting to third party mail services).
• The VPOP3 Plugin Pack is included.
• Message Rules for filtering messages into specific mail folders (version 5 or later)

(N.B. VPOP3 Basic used to be called VPOP3 Standard)