I have a new additional laptop and would like to take over my existing GMX email address.
What should I do?
On http://www.gmx.de or whatever the site is called and log in / register anmeldenDon't understand what you're getting at 😅
An email address is independent of a specific hardware.
How have you been using email so far? (Via a local client (which one?) Or via https://gmx.net?)