from_email = from_email.decode("utf-8")

      if user_from:

          header = Header(user_from, "utf-8")

      if project_name is not None:

          subject_tag = project_name

          # Due to differences in the way Python2 and Python3 encode non-ascii

          # email headers, we compare the From and To headers separately from the

          # rest of the message.

          self.assertEqual(email["To"], "zöé@foo.net")

          del email["From"]

          del email["To"]

              project_name='namespace/project',

              user_from='Zöé',

          )

          self.assertEqual(email["To"], "zöé@foo.net")

          del email["From"]

          del email["To"]

          # Due to differences in the way Python2 and Python3 encode non-ascii

          # email headers, we compare the From and To headers separately from the

          # rest of the message.

          self.assertEqual(email["To"], "zöé@foo.net")

          del email["From"]

          del email["To"]