The Virtuoso POP3 Server implementation supports the following commands as defined in RFC - 1939:

DELE
LIST
NOOP
PASS
QUIT
RETR
RSET
STAT
TOP
UIDL
USER

The POP3 Server listening port is configured in the HTTP section of the virtuoso.ini.

POP3Port = xxx, in HTTP section.

If the port is not defined in the configuration file then the POP3 server subsystem will be disabled.

Users and passwords of the POP3 Server are described in the system view WS.WS.SYS_DAV_USER over SYS_USERS. These users can be administered from the users section of the Virtuoso Administration User Interface.

The system table DB.DBA.MAIL_MESSAGE is used to stored the messages.