Folding of long lines in message bodies

I remember that there has been discussion some years ago
about folding of long lines in message bodies. The idea was
that if there is a space immediately before a line break,
this space indicates that this is a soft line break and
should be unfolded on receipt.

What happended with these ideas? Did they ever become a
standard, or a de-facto-standard?

(This message is in that format, since Eudora, which I
am using, automatically produces this format when you
use the "Wrap Selection" command.)
-- 
Professor Jacob Palme <[email protected]> (Stockholm University and KTH)
for more info see URL: http://www.dsv.su.se/jpalme/