Hmmm not jut me then. I check my hubby's e-mail's, text's, mail etc.. for him lol He says himself he can never plan a surprise for me as NOTHING gets past me, I get way too suspicious and seem to have a knack for working out something is going on before it's even happened. Just the way I am, he isn't bothered and seems to understand this and why I am like this so we just get on with it.
Maybe you could say to Boyf that you figured he wouldn't mind, or that you had sent an e-mail to him by mistake so was just finding it to delete?
Maybe drop a hint like.... "So.. if you were to get stranded on a desert island, who would you take?" and just give him a knowing look.
Come clean, if your relationship is strong enough it will survive this and you can get past the trust thing and deal with the real issue, why is he saying things like that to an ex!
Good luck! xx