maildir: could lda/lmtp log filenames?

[A. Schulze]

hello,

on a mailstorage server receiving messages per lda/lmtp I like to pimp  
my logfile.
when starting to search for a specific message I have a queueid. I  
like to combine that id
with the filename the message has after delivery to a maildir. I know,  
that will not work with other formats then maildir.

Aug  6 11:37:30 mailserver postfix/lmtp[17884]: 3hSnmj208Zz259d:  
to=<rcpt at example.org> relay=$lmtp-server status=sent (250 2.0.0  
$dovecot-id)
Aug  6 11:37:29 $lmtp-server dovecot: lmtp(1440, rcpt at example.org):  
$dovecot-id: sieve: msgid=<..>: stored mail into mailbox 'INBOX/folder'

and exactly there I would like to see "stored mail into mailbox  
'INBOX/folder/new/FILENAME'"

yes, I know, I /should/ user doveadm and avoid access messages via  
filesystem but in that case it would be much faster to access the  
information I need.

Any ideas?
Andreas