[Dovecot] rawlog for Dovecot proxies

Is there a way to use rawlog to log the full IMAP session when running Dovecot as a front-end proxy for other IMAP servers? If so, how?... I couldn't figure it out. Or is there another debug setting that can give me this information?

If not, what is the best method to sniff the IMAP session for debugging a proxy?... ethereal?

Thanks, Bill

-- http://billboebel.typepad.com/