MUMBAI: Email is dead, Facebook founder Mark Zuckerberg declared famously last November. Now, Thierry Breton, chief executive officer of Atos, one of Europe’s largest IT companies, wants to show the world how a 6-billion company can be run without internal emails. Breton recently vowed that after 2014 none of Atos’ 80,000 employees will ever send an email to another. Breton, 56, is a former French finance minister and took over as the Atos CEO in 2008. He stopped using emails a few years ago. “We use email for instant communication, which is a bad way…