changed the rendering of mail messages
Merge pull request #485 from leider/master

- new access rights, introducing super user concept
Merge commit 'ba8f6f5ff29f6f99b90eba0b8ce8b3649abe41e0'

# Via Nicole Rauch
* commit 'ba8f6f5ff29f6f99b90eba0b8ce8b3649abe41e0':