I recently received an email from a college friend that I used to be pretty close to, but lost touch with over the years. the message simply said "are you there?", with nothing else in it. They had tried once before to contact me (a year or two ago I think), but did it by emailing my boss at work which I thought was really odd and actually somewhat inappropriate. I say that because I know for a fact this person would have got upset had I tried to do the same thing and contact them through via their supervisor. Anyways, I'm not so sure I want to rekindle a friendship with this person. I don't really have anything against them, but I had tried staying in contact after we left college, but this person rarely responded in spite of my continued efforts to maintain a friendship. After a while I just gave up and moved on after they indicated they were too busy to ever get together or email, yada yada.
I might have considered responding if the message was more personal, but I'm undecided at this point. I kind of don't like the fact they had emailed my boss to find out where I was instead of looking for my contact info on the college alumnae database. What do other people make of this? Would other people respond, ignore, or just wait and respond later?