IMAP (Dovecot 2.1.7) and Outlook 2013

I have two questions for getting an Outlook Client working with a native installation of ISPConfig 3.0.5.4p5:

First i added some "special use" entry`s to /etc/dovecot/dovecot.conf

Code:

namespace inbox {
        inbox = yes
        mailbox Drafts {
                special_use = \Drafts
                auto=subscribe
        }
        mailbox Junk {
                special_use = \Junk
                auto=subscribe
        }
        mailbox Trash {
                special_use = \Trash
                auto=subscribe
        }
        mailbox Sent {
                special_use = \Sent
                auto=subscribe
        }
        mailbox "Sent Messages" {
                special_use = \Sent
        }
 }

Outlook lists all folders as requested, but when i write a mail, it`s stuck in the mailqueue with error #0x8004010F, so here are my questions:

Is Dovecot (2.1.7) configured only from dovecot.conf or are those subentries under conf.d also involved?

Why is the client not able to sent my messages?

I also added some entries for "imap_capability = +XLIST SPECIAL-USE" but that not even did the trick ...

 

Check This http://itissolved.blogspot.in/2012/07/0x8004010f-outlook-data-file-cannot-be.html

 

That`s in deed a quite common solution for most of those errors regarding a corrupt pst/ost file, but for me uninstalling, deleting all registry-entries and reinstalling did the trick.

Thank`s anyway