I remember getting an email when my very first submission was published, several years ago but I'm pretty sure I didn't get one for my latest earlier this year - presumably a change of policy with the change of staff? The first indication I got of 'Rules of the House' having been published was when I got a review.

As long as it's long enough to consider and loosely on-topic for the site's audience, there isn't much they won't publish as far as I've seen - very underage content or naming individuals would be about the only reasons I could think of for a story bouncing, although there's an official list around somewhere. Pretty much any combination of male or female, alien or machine, consensual or not, English or foreign-language ... have you had something rejected without a clear reason?