Dear Stu,
I, too, have my own experiences with such a feeling, and heavy emotions. Rather than detail such things in a letter, I am writing to inform you I will be visiting you to discuss such things personally. You need not go through any special preparations to make ready for my arrival, consider it 'informal.' That is, I intend to visit you in the context of a friend, rather than a ruler.
I will see you soon,
Princess Celestia
Dear Anon,
I feel I should warn you that as per that devious deviant ruining your good name, they're at it again. I find myself once again genuinely proud of you, and glad for our friendship. I will be visiting Ponyville in the near future as well.
Your friend,
Tia