Why on earth would your DH get worked up about you receiving a card from an old classmate? If he doesn't believe you when you tell him there is nothing going on, I think I'd be more worried about that than some random birthday greeting.
Have you considered the possibility that this man is sending birthday cards to everyone who attended the reunion?
Seriously, you have bigger issues than getting a birthday card unexpectedly from an old classmate. Seems like you and your husband are blowing this way out of proportion.
An old boyfriend sending cards proclaiming his undying love for 30 years = Problem.
A random classmate sending you a birthday card once in 30 yrs =No Problem. (I am going to give him a pass on the second one, since it isn't her birthday and he probably got her mixed up with the person above or below her on the reunion list!)
Reunion organizer sending reunion related emails = No Problem
Husband making a stink about it = BIG PROBLEM!!!




