command. The Interactive Mail Access Protocol (IMAP) server daemon. imapd is invoked by inetd and listens on
port 143 for requests from IMAP clients. IMAP allows mail programs to access
remote mailboxes as if they were local. IMAP is a richer protocol than POP
because it allows a client to retrieve message-level information from a
server mailbox instead of the entire mailbox. IMAP can be used for online and
offline reading. The popular Pine mail client contains support for IMAP.