Occasionally it happens you met your friend after some 15 to 20 years. During meeting he/she shared his/her email id to you. In this case I observed you can’t stop your-self to express your feelings. Definitely by a day or two you will drop a mail. In this session let you know the format how to write this letter.
Letter format for your friend to whom you met after a long time?
Dear <Your Friends Nickname>,
Thank you every much for your letter which I’ve just received.
You are perfectly right about my memory for names-it is very poor indeed. But in this case I don’t blame myself very much; after all, we met after about seven years and the meeting was so unexpected. In fact, it took me quite some time to realize that you always used to call me <Your Nickname>.
As soon as I back here, I rushed into our store room and got hold of my favorite album. And once I opened it, I was back in the good old days. How I wish they could come back ! What fun we had together and how happy we could be even with tests and examinations to worry us !
Well, things have changed, but it was great meeting you after so long. I know you travel a lot more than I do. So if you happen to come this way again, do make it a point to break journey at least for a day. I shall look forward to that day.
For now all the best.
<Your Full Name>