I know everyone is rushing to decry Apple and their draconian behaviour ("first they took my unsigned apps, now they want in my email? TO THE PITCHFORKS!") but the likelyhood is someone has fiddled with the spam filtering and they've broken something. If the first thing you jump to is some conspiracy you're ignoring the simple rule of technology that behind every good wild goose chase is a member of staff who's quickly hitting 'roll back changes'.
Spam should never be deleted, it should be triaged and left to the user to deal with but it's definitely possible someone has screwed up. What I'm saying is it's probably a fuck up, what I'm not doing is defending it.
No. Normally I'm inclined to assume it was am accident, but If it was just triggering false positives on the spam filter, the email would be showing up in people's spam folders. Instead it is getting dropped without any trace.