cyrus2courier | converts Cyrus mailbox format to Maildir | Mehr ...
cyrus2courier is a nice little tool to convert a single mailbox from Cyrus-Imap (versions 1.5.x, 1.6.x, 2.0 and 2.1.x) into the Maildir++ format used by the Courier-Imap and Dovecot IMAP servers. . Homepage: http://www.madness.at/projects/