Changing sieve fileinto "INBOX.Junk"; into fileinto ".Junk"; IMAP problem

Hi everyone,

yesterday I changed my IMAP directory structure in dovecot because Android mobile phones using the standard maill app weren't able to delete mails permanently. The problem is the standard IMAP structure of dovecot wich is nomally like this:

INBOX
INBOX.Junk
INBOX.Sent
INBOX.Trash

I added the following lines into /etc/dovecot/conf.d/40-plesk-imap_structure.conf for changing the prefix:

namespace inbox {
separator = .
prefix =
inbox = yes
}

Now the new...

Changing sieve fileinto "INBOX.Junk"; into fileinto ".Junk"; IMAP problem