We've recently setup a webserver, and everything seemed to be running smoothly, up until tonight, we came accross something.
We got some e-mail messages that were delivery failures, sent out from ficticious accounts on our box. Admittidly, I know next to nothing about the mail end of things, but Cpanel makes this sort of stuff pretty easy. Anyone know why these would be being sent? Any way to prevent stuff like this? Tips on securing things a little more? Somewhere for me to read up on mail