Hello,
Do you have root access to the system? If so, you can find email activity logged at
/var/log/maillog. You can search this log for terms such as "dovecot: imap" to see IMAP activity. Look for the "in=" and "out=" entries, as those represent the incoming and outgoing bandwidth associated with the session. EX:
Code:
grep "dovecot: imap" /var/log/maillog
Thank you.