Related: A Look at Three E-Mail Newsletter Tools It can also be integrated with employees' mobile devices. Amazon may be best known for its delivery service (and more recently, drones and perhaps even its lineup of original series), but it's looking to add another feature to its extensive resume: The Jeff Bezos-helmed company has launched a service for work email, a move that directly challenges corporate-email king Microsoft.Ĭalled Amazon WorkMail, the cloud-based service works with email clients (such as Microsoft Outlook and Mac OS X), which means businesses won't have to install a new one, and allows users to send and receive secure emails, manage contacts and share calendars.