I do know that this little box of horrors has 200-300MB mbox INBOXes on an ext3 filesystem formatted in 2005. I am very nervous about converting them to Maildir at this point.
Fortunately, it just involves reformatting the data and a little reconmfiguration of dovcot. If you can find the tool and disk space, it's well worth doing. Of course, when running a proverbial dinosaur, you're often more preoccupied with preventing the next proverbial meteorite strike.
What I meant was, are certain types of filenames "blocked" by policy from being created via IMAP commands? I'm sure I could run a few tests to answer this for myself, or better still, go through Timo's code.
I never saw anything that could do that -- maybe you can torture the virtual mailbox facility to get that done. If all your concerned is dovecot dot-files, you can place the indices somewhere else other than the user's filesapace.
One last problem area is that many users have soft-links to mailboxes located on a second drive, but these never appear in folder enumeration lists or they appear grayed out in SeaMonkey/Thunderbird. I've tried just symbolically linking to directories containing other mboxes, but sometimes it works, and sometimes it doesn't. I wonder if there's paranoia checking in the code that follows symbolic links to ensure that uids/gids of the "owning" directory and the linked-to directory (or files within it) are the same.
It works for me. From what I see, the ownership of the symlink is ignored; it's the underlying file that counts. Maybe a subscription issue?
Joseph Tam jtam.home@gmail.com