MemoServ is a utility allowing IRC users to send short messages to other IRC users, whether they are online at the time or not, or to channels(*). Both the sender's nickname and the target nickname or channel must be registered in order to send a memo.
MemoServ's commands include:
SEND - Send a memo to a nick or channel
CANCEL - Cancel last memo you sent
LIST - List your memos
READ - Read a memo or memos
DEL - Delete a memo or memos
SET - Set options related to memos
INFO - Displays information about your memos
RSEND - Sends a memo and requests a read receipt
CHECK - Checks if last memo to a nick was read
SENDALL - Send a memo to all registered users
STAFF - Send a memo to all opers/admins