My fiance has recieved a couple of emails from her ex boyfriend of 3 years, and is writing back to him. It's pissing me off because she continually bad-mouth him, always saying what an ass he is, and that she'll never speak to him again. But, apparently, they've swapped street addresses so they can write eachother. I'm typically not the jealous type, but let's just say that there's reason to be jealous over it (not going into details). I don't care if she talks to any other ex of hers. I still talk to my ex (though I'm trying my damnedest to stop, but I can't until I'm financially separated from her). I tried to tell her how I felt about it and she got mad at me.
Am I out of line for being upset about it?
(and before someone asks, no, I'm not reading her email, she told me about it.)
Update:
All's well. I talked to her and the ex, told them both how I felt. They both understood, and I'm gonna leave it at that. She wasn't trying to do anything to get my attention. I trust her, and I need to show that.

Just me being over protective.
Am I out of line for being upset about it?
(and before someone asks, no, I'm not reading her email, she told me about it.)
Update:
All's well. I talked to her and the ex, told them both how I felt. They both understood, and I'm gonna leave it at that. She wasn't trying to do anything to get my attention. I trust her, and I need to show that.
Just me being over protective.