Here's a little IMAP client in Go.
.contains the "imap" package that implements the IMAP protocol clientimapsynccontains a "main" package that uses the "imap" library to list or download gmail labels (= inboxes)
This hasn't been tested against anything but gmail's IMAP yet, and will likely eat your mail, etc.
To run imapsync:
bin/imapsync list username passwordbin/imapsync fetch username password MAILBOXNAME