Internal 75 percent of Yahoo employees don’t use Yahoo Mail A leaked internal memo sparks a media dogpile, highlighting the risks of sending potentially damaging information in companywide emails. By Russell Working@byworkingNov. 27, 2013 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.