The LogDB.Sessions table contains a record of all 'sessions' logged by VPOP3. A session is something like a POP3 server session as an email client downloads messages, or an SMTP client session as VPOP3 sends a message out to the Internet, and so on.
Columns
sessid - this is a bigint sequential value which identifies the session uniquely in the database
datetime - this is the date/time when the session started (in UTC)
duration - this is the duration of the session (in seconds)
sesstype - this is a single character code indicating what type of session this is (see below)
errorcode - this is text containing any error detail about the session (eg invalid password etc)
name - this is text describing the session. This may contain client IP address, username etc