Unix – How to monitor outgoing email from Unix and Sendmail


I am running a FreeBSD server and I have been sent a warning that spam has been sent from my server. I do not have it set as an open relay and I have customized the sendmail configuration. I'd like to know who is sending what email along with their username, email subject line as well as a summary of how much mail they have been sending. I would like to run a report on a log similar to how it is done when processing Apache server logs.

What are my options?

Best Solution

One idea is to alias sendmail to be a custom script, which simply cats the sendmail arguments to the end of a log before calling sendmail in the usual manner.