monitoring outgoing emails

Hi people. Do you know is there any tool/plugin for monitoring outgoing emails from server with postfix? Maybe postfix has this feature? I am looking for information which linux user sends email, how many of them and how often for example, per hour, day. That would be perfect plugin.

 

I have found this:https://packages.debian.org/stretch/pflogsumm

 

This is really nice piece of code but I have to wrap it by some bash script. I need sending emails.

 

No need to wrap in bash script. I added this to root crontab:

Code:

#Taleman, pflogsum
10 0 * * *  /usr/sbin/pflogsumm -d yesterday var/log/mail.log 2>&1 | /usr/bin/mailx -s "`uname -n` päivän postitilastot pflogsum" [email protected]

The # is comment and one line, rest is all on one line.

 

I did:

Code:

0 0 * * * `cat /var/log/mail.log | /root/pflogsumm-1.1.3/pflogsumm.pl | mail -s Report [email protected]`

I have few questions:
1. Is it possible to add some "content" to this mail?
2. Is it required this redirection "2>&1"? My line does not generate any output to console.
3.What is "-d yesterday"?
I think I still need script, because I need fetch some data from generated report. Exactly how many emails send particular mail user per day.