[Dovecot] lmtp logging incomplete (does not tell what mailbox mail is actually being saved to!)

We created a new virtual domain and created a user in that domain in our pgsql database. Instead of creating any directory structure in /home/virtual/mail/<domain>/<user>, I just sent a test email to see if dovecot's lmtp would autocreate. And it did! And mail appears to be delivered to an inbox.. but, logging is weird and I'm not sure everything is working as it should because:

Dec 20 23:01:28 mx dovecot: lmtp(21458, user@example.com): lUDFG8tZ8U7SUwAAO3tENA: msgid=20111221040122.GP13367@hostname.example.org: saved mail to

. so why doesn't dovecot log where mail is stored/saved?

thanks, Gary