Well, here's the thing. E-Mail is built on POP3. POP3 isn't a standard as such, so there's nothing to stop you from doing e-mail without POP3, but why the hell would you want to? It works, and works well! You're just not going to find a reasonably good solution that's free of POP3 dependence AND easy to set up AND built entirely in PHP. You'd best prepare yourself for some serious hacking.