This article describes how you can monitor your ISPConfig Postfix mail server with Mailgraph. Mailgraph creates daily, weekly, monthly, and yearly graphs of sent, received, bounced, and rejected emails and also of spam and viruses, if SpamAssassin and ClamAV are integrated into Postfix (e.g. using amavisd-new in the ISPConfig perfect server tutorial’s). These graphs can be accessed with a browser.
https://www.howtoforge.com/tutorial/postfix-monitoring-with-mailgraph-on-ubuntu-14-04/
