Letters are the most formal and cheapest means of contacting another individual when they are not around. In order to write a letter you must first visit the postal halls that exist in all the major cities. There you REQUEST LETTER and you will receive a blank, ready for writing on.
To list letters in your inventory.
Typing this clears anything previously on the letter. It also ensures that you are the only person able to write on the letter.
Typing this posts a letter into a pillar box. You must post a letter for it to reach another person automatically.
"ADDRESS LETTER <name>"
This addresses your letter to a particular player.
This command writes text on the letter. It will let you write text directly onto the letter.
Needless to say, typing this allows you to read a letter. Unless you are given permission, it is bad form to read other people's mail.
In the postal hall, this command puts your letter into the recycling bin, erasing its contents and allowing the next person who requests a letter to use the blank page.
Typing this command in the postal hall will enable the postal staff to hand you a blank letter.
Seals a letter for your unique stamp, using a piece of wax.
Unseals a letter which has been sealed so that it may be read.
Permanently pins the letter up in your location so that others may read it.