I run a Linux server with a few friends using it to host a site or two. I want to monitor any emails the server sends out to watch for things like spam bots signing on on their sites or the sort.
I believe the only thing being used here for mail is mail/sendmail or the php mail. I know how to check the queue and the sort, but I'd also like to see something like a summary of emails sent out to/from and a subject, something like that.
What are my options?
I suppose I could always just watch /var/maillog ? Any decent tools to summarize the file?