Greetings,

I have a user that signed up with the user name:

Heidi_Frühling@whatever.com

I don't know if its the ü thats probably causing it but every email
coming into our system for this user is rejected with the message
sorry we couldn't get this through. Because the user doesn't exsist on this system.
Does anyone happen to have a clue what is causing this?

Avery