Hi auddawson,Improve the FixYa experience for everyone by voting.
I've fully investigated your query with Yahoo and this is their final response:
Can I switch back to a previous version of Mail?
Last Updated: June 16, 2011
We have removed the "Return to Original Mail" link from the help menu
as we're strongly encouraging all users to migrate to the newest
version of Yahoo! Mail. We will continue to invest heavily in the
latest version of Yahoo! Mail, further improving it and delivering more
compelling features to our users.
We know that changing to a new interface can seem daunting, so we've
done everything possible to make the transition easy. We have created
help pages specifically for users who have recently switched to the
newest version of Yahoo! Mail, highlighting differences that you may
We hope you'll give this new version a try. It's our fastest version
of Yahoo! Mail yet, with improved protection against spam and advanced
features like in-line photos and videos.
Sorry that Yahoo has taken this step. You'll either have to change to another eMail provider or get used to Yahoo's latest offerings.
All the best