Re: how would your ex gf's ex man find out your email???
Could he have gotten information on your through her account? There are some "services" where you can see people's friends, and if you are her friend he could get access to you through no fault or wrong doing of her's. Of course, you could always play dumb like you don't know who he is and ask him why he wants to be friends with you. Did it ever occur to you that he may be trying make waves? Do you have a real reason to believe she is lying?