out of the blue, what would their motivation be? We have had no contact since we were 12, I'm now almost 50. Got an email saying (paraphrased) "Hi, bumped into someone who sent me copies of old school photographs, and thought I'd contact you as I admired your intellect."
Doubly weird because I now live on the other side of the world, have been married (so changed my name but am now separated, heading for divorce) and have no friends in common, so he must have had to do some serious googling to find me.
I've done a quick bit of internet stalking in return and he seems well respected in his field and on the level. He was a nice kid when we were 12 and we were friendly although not romantically involved at all. Should I reply or leave it?