Mail Feature By Anyone ??

[pkb at omsvax.UUCP]

	Has anyone added the following feature to the mailer OR
does it exist in 4.2 or V or whatever ???
	Something that will inform  the person who sent mail to one or
more users, that his(her) mail has been READ by the receipient(s). 
Just delivering mail and EXPECTING the other person to have read
is not good enough. 
	Such a thing may not work on a universal basis, but will like to have
on all internal systems.
	Any help or recommendations. Am running 4.1bsd.

	Praveen
	..hplabs!omsvax!pkb
	..decvax!microsoft!omsvax!pkb