I'd really like to turn my email function back on, but it just got to be way to time consuming dealing with all the responses to the rejection emails.
My rejection email used to give a half-dozen reasons why a site could have been rejected, plus a link to my rules page (I'm up to a staggering 11 rules), and another link to a webmaster update page that contained a bunch of ramblings about what I'm doing with my site. I still got too many "what's wrong with my site" replies to rejection emails.
I've never failed to respond to an email asking about a site, or a submitter in general. I've even had a few PM's over here asking about sites. By not sending a rejection email, it put's the onus on the submitter. It takes just a few seconds to respond to an rejection email, but it's more time consuming to initiate the email to me asking about a site, so if you're doing that then maybe you're a little more serious about this business.
Having said all that, I'm toying with the idea of turning the acceptance email thingy back on.