Very urgent issue with Bandwith Monitoring POP3 traffic from maillog

I have some clients retrieving their mails with POP3. After retrieval their mailprogram leaves all messages on server and keeps track not to transfer them any few minutes with each request for new mail.

However the /var/log/maillog entries issue sizes of the complete INBOX retrieval for each connect ...

Hence, bandwidth monitoring reports 200 GB and more per day on email traffic for one customer.

Below is a sample from maillog. My problem is, that i can not monitor the traffic contracted to my clients. I'm invoicing about volume used.

Therfore I hope you understand the urgency. Please help asap.

Thanks a lot in advance.

Kai Ewers

Aug 18 12:36:04 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 12:39:04 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 12:42:03 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 12:45:03 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 12:48:04 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 12:51:04 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 12:54:05 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 12:57:02 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 13:00:03 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 13:03:03 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 13:06:04 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 13:09:04 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 13:12:03 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 13:15:03 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 13:18:04 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 13:21:03 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037
Aug 18 13:24:04 sr01 dovecot: POP3(info.gencit): Disconnected: Logged out top=0/0, retr=0/0, del=0/2150, size=424454037