log file and volume of data ...

[Vincent Colet]

one question ...     I use qpopper and I want to check the volume of mail data fetched by some users by POP3   ok with the statistics option activated et we can check syslog/log file (f.e. /var/log/mail) and search some records like       Feb 17 00:00:49 mail popper[29402]: Stats: randy 0 0 1 385 randy.example.org 192.168.2.4   the 2nd number after username is the bytes deleted from server, the 4th number after the username is the bytes left on server;  but why it don't contains some info on true bytes sent back to user ?       1) a user can delete messages without downloading it at all     2) a user can fetch the same message more that one time without delete it on server   How evaluate correctly the volume of data fetched ?   thanks, Vincent Colet