Erik, you are right about the usage of this mailback
service. You have to know MIME to be able to see what
your client is doing wrong with a message.
But, it might be used for users which just want to have some
MIME messages.
Anyway, the URL you listed:
http://www.chalmers.se/SUNET/MIME-Mailback-Service-E.html
is a description of some of the tests which is very stable, and
it will never move.
I gave an URL (which was miss-spelled) which gives a more
extensive description of each test, and that URL _WILL_
move as soon as some technical things will be fixed
at the Bunyip HTTP server.
So, before we have an URN to use, use the URL above
to see a description of the tests.
Sorry for all problems you have had to locate this paper.
paf