[warp]

I used to run a setup like this for a while. Spam filtering is the most annoying part of it, so I soon outsourced that (first to google postini, then to spamhero.com). But then I realized that my e-mail is now flowing through these services anyway, in fact, e-mail is unencrypted and flows through many ISPs which all can read it if they want to be evil -- so I might as well outsource all of it. So I switched e-mail for all my domains to tuffmail.com a few months ago, and am very happy with them so far.