You weren't off topic, kimeran, in fact, I am glad you brought it up. I have been thinking of your response tonight and how I may have handled it. This is going to be lengthy, but I promise you'll feel better about your response.
Two years ago, I was covering a story on a student at the University of Minnesota-Duluth who had died due to a disease of the large intestines (can't recall the name of it right off the bat). Anyway, I was dispatched to the music department, as the professor and a student wanted to talk about it. While talking and getting their names, the student said his name. I recognized his last name and asked how he was related to some people that I knew in childhood. He said the two of which I inquire are his aunt and uncle (they were brother and sister and meaner than the devil!). These two called me names that I can't and won't write here, but I did tell him that "they were mean to me." That is all I said and you know, he couldn't say anything . . . what could he say in defense of his relatives? A few weeks later, I ran into him in the hall, as he introduced himself to me again. He didn't say anything about his aunt and uncle to me, so I'm sure he was told not to or decided not to involve himself.
I said all this to say this: I think I would have torn up the letter and thrown it away, too. Or, maybe I would have written "Return To Sender, No Such Person Here" on the envelope. Or, maybe I would have written to that person and telling them how bad they had hurt me and emphasized there is no excuse for the damage you have caused and how dare you for even contacting me about this. I would NOT have put my return address on the envelope, but I would have written my name, for example, using my first and middle initials only, then my last name. I would not have mailed it from the town/city I lived in, as I would not want to be contacted by this person again. Yes, as a Christian myself, the Bible commands me to forgive those who wrong me, but, and I stress very strongly on this last part: No where does it say we have to associate with them. End of story.
Congratulations on your accomplishments! 
No thanks to the person who wronged you, other than you are not that person and don't have to look at them everyday or live with them.
