You'll get all of your e-mails back from whatever service they're stored on whether Exchange, Live, Gmail etc. You'll still have to setup the accounts and get them syncing again. You'll have to enable all of the folders under those accounts as well if you want those to come in.
I purchased my Arrive from a guy who had to give up the phone for another because of his work so mine technically won't carry the warranty. Since I'm on prepaid I have nothing to lose since I have no TEP or similar protection. I'll just purchase another 2nd hand phone if problems. I get cheaper service now. I need 32GB because of the music & podcasts