delete

DELETE  -  mark messages for deletion

Usage:  DELETE [message-sequence]
  Unless specified, the message-sequence is "current".

DELETE marks one or more messages as deleted.  The messages are not 
  removed from the file until you use the commands EXIT, EXPUNGE or BYE.

Examples: 
    MM>delete 10			 #by message number
    MM>delete before January 1, 1989     #by date
    MM>delete subject baseball           #by word in subject field
    MM>delete from rcl before Tuesday    #by sender and date

For more help type "help" and one of these topics:
   undelete   message-sequence   exit   expunge   bye   message-handling
   read-mode kill