kh-berlin.de e.mail address (employees)

• Personal eMail with @kh-berlin.de
• How to change mail box presets to not delete possible Spam mails right away?
• How do I set up my university email address on the Mac?
• change password or absence note for my weißensee email?
• My "weißensee" mailbox is very full. How can I archive important emails and free up space? (macOS X)