Using the Postfix Logging Summary tool it is possible to analyze the log file generated by Postfix.
apt-get install pflogsumm
To create a summary:
pflogsumm /var/log/mail.log
To send a weekly report, you can add this to the root’s crontab:
# After the log rotation use pflogsumm to generate an overview of
# the mail activities from the last week.
0 5 * * sun /usr/sbin/pflogsumm /var/log/mail.log.1