Displays a list of memos sent to you, in your active memo folder. You cannot see memos that you have sent. If no memo folder is selected it will show you how many memos you have in each of your folders.
/msg memoserv list
This will show you the memo numbers so that you can easily choose which to read or delete. You can see how many memos you have in each folder, so you can decide if you should select one to read through its contents.