email weirdness

So I have my berry retrieving 4 different email accounts -- hotmail, gmail, yahoo and my work mail through an enterprise thingy. Last night at 1:15 the berry started buzzing. Mail started pouring in. "Wow, I'm popular!" I thought. And the buzzing didn't stop.

112 email messages later I started reading. These emails were dated from 2005-2007 and were ones that I received way back then. They all just suddenly were delivered again (but not on the websites for my emails, just on the berry).

Any ideas why?