.: Help for mail

The mail command sends a letter to another adventurer by
name — with optional coin from your purse and an item from your pack. It reaches
them whether they are online or away, and waits in their mailbox until they read
it. Any coin lands in their bank and any item in their pack.

Usage: 

  mail  - Begin composing a letter to that adventurer

You will be asked for a message, how much gold to attach (from what you are
carrying), and an item to attach (or "none"). Nothing leaves you until you
confirm the send.

Read your own mail with the inbox command. There is a
short wait between sendings.