On 21.1.2013, at 21.54, Richard Platel <rplatel@tucows.com> wrote:
As stated in my previous message, we have some old compressed maildir messages with incorrect sizes in the filename. These messages cause dovecot 2.x problems.
I'm trying to write a script to crawl all our messages, check the actual message size and if necessary, fix the filename. However, when I do this, dovecot gives the message a new UID on next login. If I change the filename in dovecot-uidlist, dovecot still gives a new UID on next login. If I change dovecot-uidlist and delete the index, then the UID is preserved.
I don't really understand why deleting dovecot.index* would make a difference here, except maybe as a workaround in case the user has that mailbox selected, because the filenames could be cached in memory.
http://dovecot.org/tools/maildir-size-fix.pl http://dovecot.org/tools/maildir-size-check.sh
Those scripts kind of do what you want, except not fully, so it would be nice to get one fully finished one :) The best way for the script to would would be to:
- scan through a maildir, figure out what needs to be renamed to what, but don't actually do it
- lock the maildir with dovecot-uidlist.lock (src/util/maildirlock comes with dovecot)
- doveadm kick user's imap/pop3 sessions, and even better if it was possible to kill -9 any pending processes
- rename the files and update dovecot-uidlist
- delete dovecot-uidlist.lock
This separately for each folder.