/mail read - read your mail

/mail send <playername> <message> - send mail to a player

/mail sendall <message> - send mail to ALL players - don't spam

/mail clear - clear all of your mail

/msg <playername> <message> - send an instant message to a player

/r <message> - reply to the last message you received

If you would like to form a group/clan, contact an admin.