I don't understand why it fails in message.el:

(defcustom message-use-idna (and (condition-case nil (require 'idna)
				   (file-error))
				 (mm-coding-system-p 'utf-8)
				 (executable-find idna-program)
				 (string= (idna-to-ascii "räksmörgås")
					  "xn--rksmrgs-5wao1o")
				 t)
...



Bye, Reiner.