K)ill: This command is used to erase a message. The security option 
(Kill, Password, Receiver, or None) determines who is authorized to 
remove a message.  

Tips:
1. You are encouraged to leave messages, but also to eliminate old 
messages that are no longer useful. The SYSOP will periodically purge 
the collection of old messages to prevent the system from becoming 
cluttered.  

2. Occasionally, a message will be deleted that you want retained on the 
system. Such misfortune can be remedied by reentering the message using 
the "E" command.  You can also ask the SYSOP to recover the message.
Just specify what number the message had.
 
