IMAP: Sent and Trash Folder
The Trash folder and the Sent folder are not integrated into Mail.app - they show up but with their own icons. That implies that mails sent with Mail.app are not saved on the server but locally (both folders show up with the same title "Gesendet" in the German version of Mail.app) and deleted messages go into the local Trash folder respectively Mail.app has it's own folder on the IMAP server named Deleted Messages.
Hence the question: Can I configure which folder on the IMAP server to use for things like sent mails, deleted mails and so on?