Quota plugin creates IMAP folder

Hi everyone,

I have noticed recently that Dovecot creates lock directories under users' Maildirs which look like IMAP folders. This is bad since users will see IMAP folders that are not supposed to be there.

In my logs I see

dovecot: imap(...): Error: file_create_locked(/.../Maildir/.vsize.lock) failed: Is a directory

The directory in question

# ls /.../Maildir/.vsize.lock/ cur/ dovecot.index.log dovecot-uidlist maildirfolder new/ tmp/

so Dovecot seems to think this to be an IMAP folder.

I am using Dovecot 2.2.27 under Debian, built from source, the lock_method is set to fnctl, and the quota plugin uses the maildir method.

Can somebody advice me on how to fix this?

Best regards, Thorsten