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There are many advantages of sending a letter. Sending letters are much more personal. When you receive a letter it makes you feel privilege that someone has taken the time to write a letter, buy an envelope, buy a stamp and find a post box to post the letter into.

Why not send a letter, rather than sending an email? It is a direct and a more personal way of staying in touch with someone, it makes the person who receives the letter feel more appreciated and you will build up a strong relationship and reinforce your friendship.