If obsoletes is implemented in this way, I see no privacy
concerns. If you feel strongly about this, the best might
be to say that only the original author and no one else
can obsolete a message. That is the way it is defined in
X.400.
This isn't what the standards say.
That is the way it is defined in X.400. X.400 says that
only the "authorizing users", which corresponds to the
"From:" field in RFC 822, is allowed to obsolete its
own messages.
------------------------------------------------------------------------
Jacob Palme E-mail: jpalme(_at_)dsv(_dot_)su(_dot_)se
Phone: +46-8-664 77 48 or +46-8-16 16 67
Department of Computer and Fax: +46-8-664 77 48 between 9 am & 2 pm WET
Systems Sciences (DSV) Postal address: Skeppargatan 73,
Stockholm University S-11530 Stockholm, Sweden