[VOPmail Beta] Log Analysis

[Simon]

Please accept my apologies as I believe the following question has been posted to this list a few times before, however I have lost my archived messages...   I am looking for a program that can extract all of the information from VOPMail's logs (VOP v5.1) and collate them together into a chart detailing which users have been using the mailserver and how many messages they have sent/received for the current day, previous week and even a month long quota.   I would be extremely grateful if anybody could direct me to such a tool or even some related information.   Thanks in advance Simon.