post office box IMAP - special folders are absent

Hello together

I have provided to me a post office box IMAP by pd admin (my own Domain). This post office box also claps, but folder lacks of the Sent and the draughts. If somebody can say me, how do I get this in the post office box? I habs already tries about the web mail from pd admin, but this does not function. I call away the mail by Thunderbird and have already tried to provide there nen folder, but this is not looked as a special folder.
to thanks for your help. Tobi