[Dovecot] Patches to log imap bandwidth?

Anyone patch dovecot to syslog bytes transfered during a session or anything of that sort? I'm trying to track down imap bandwidth spikes, and unfortunately the uid (according to ipfw) for the imap port spikes is 0. (Presumably FreeBSD's ipfw accounting is based on who started the app instead of the effective user id?)

-- Jason Fesler, email/jabber <jfesler@gigo.com> resume: http://jfesler.com "Give a man fire, and he'll be warm for a day; set a man on fire, and he'll be warm for the rest of his life."