Corrupted index cache file /local/data/dovecot/indexes/mail/X/XXXXXXXX/.imap/delivery.log/dovecot.index.cache: Broken MIME parts for mail UID 30880
DUH! Please ignore the Corrupted index cache file; the "mailbox" in question is a file named delivery.log (i.e. procmail log file) that is in the user's ~/mail directory. Of course there will be problems trying to index this file, it is not an mbox! *sigh*
Okay, I think this rules out an indexing problem. But the main problem persists, why has IMP all of a sudden begun reading the entire contents of this user's mailbox each time it connects, and why has the started since upgrading to Dovecot?
I have another hunch. Time to speak to the user...
Many thanks for the help so far!
-- Chris O'Regan <chris@encs.concordia.ca> Senior Unix Systems Administrator, Academic IT Services Faculty of Engineering and Computer Science Concordia University, Montreal, Canada