Internal Email 40 times more effective than Facebook and Twitter, report says Just when you thought you’d never have to spam a customer or an employee inbox again, a new article argues the power of email. By Russell Working@byworkingJan. 16, 2014 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.