Test IMAP using Telnet

telnet localhost 143

   * OK Courier-IMAP ready. Copyright 1998-2002 Double Precision, Inc.

   A login spam@compute.info mypassword

   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