smtp management. Sending statistics tracking?

Question

CMS

Hello.
Such situation.
There is a rented vpn. With all settings for mailing. Not a problem.
Now a question.
Tell me how should I do or what should I use to:
Track how many emails were sent from my smtp;
Make restrictions for my smtp?
And other possibilities.
Example: such as mandrill. I'm not going to make a second mandrill. But here we need all the statistics of departures from my smtp.
Or other solutions to this problem. What systems to use, is there a ready-made one, etc.?

Answer 1

smtp statistics shows logwatch