telnet my.server.com imap
shows:
* OK Courier-IMAP ready. Copyright 1998-2002 Double Precision, Inc. A login test@example.com john A OK LOGIN Ok. B select INBOX * FLAGS (\Draft \Answered \Flagged \Deleted \Seen \Recent) * OK [PERMANENTFLAGS (\Draft \Answered \Flagged \Deleted \Seen)] Limited * 0 EXISTS * 0 RECENT * OK [UIDVALIDITY 1021381622] Ok B OK [READ-WRITE] Ok C logout * BYE Courier-IMAP server shutting down C OK LOGOUT completed