Amazon plans to launch WorkMail, an enterprise email and calendar service, in the second quarter of this year. WorkMail will compete with the likes of Microsoft’s Office 365 and Google Gmail and Google Apps. WorkMail is built on Amazon’s cloud computing unit called Amazon Web Services or AWS. The email service is going be to encrypted and companies specify which regions to store their messages. WorkMail will cost around $4 per inbox per month. It comes with 50GB of disk space. Read more.