I just started up a new instance that i build using debian squeeze on amazon last night. This morning I just got an email saying that I
reached a limit on the volume of email you were able to send out of SMTP port 25 on your instance
I'm not sys admin min by any means but I'm relatively comfortable using linux, but I've never had this problem before. I tried searching for some mta's installed that i know of, postfix, exim etc.. and saw nothing, so I think in need to go a bit lower level and just monitor port 25 to see what's happening.
Can someone enlighten me as to some tools I can use to find out what mail activity is going on on my server? And maybe some tips on tightening things up, I don't use a mail server at all, i really only run webapps.