Just get a regular account instead of those public services. Some random name at gmx.de for example. With the "d-" mail never appears, without it it works but the mail body was "undefined" when I checked what that service showed. I deleted it again.

I also have such a throwaway-but-real account in my "About" under my user name here, just added it. Should have done that anyway, you just reminded me that I should.