If you don't have this feature or know
about this feature then you will hate
it or hate it when you find out about
it.
This would be a company owned
email client. Every previous revision
to the email you sent has been saved.
Did you change something because
you sounded too straight
foward?
Did you reveal a position that you
realized would weaken your
arguement? Are you looking for a
better lie? Even though you deleted
that while writing your email, actually
it has all been saved. Do you secretly
want your competetors to think they
caught something unintentionally
sent by you, so they can better act on
it?
A simple admin code can reveal your
hidden messages. When you the
admin/boss, gets the email it comes
with a percentage value of how much
the email has changed compared to
the finished product.
Offer free email accounts to your
clients or say that the server only
recognizes email of this particular
software and then see how well their
negotiations stand up to yours.