Im sorry but i couldnt found a response in the www. I need to change the zimbraMailCanonicalAddress: thomas.pfenniger@stiftung-buehl.ch in to
zimbraMailCanonicalAddress: thomas.pfenninger@stiftung-buehl.ch and i couldnt found a solution for this problem.
the reaseon why i have to change it, its beacouse in the adressfield it shows up all the time with the wrong adress and he cant receive mails.

Thank you very much