If you don't like, or simply don't have the time, to constantly check up on the tab in the browser where your email is open, it is time to download an e-mail client. This category has every email client you can think of.
Tested Softwares Limited
Dolsin Business Solutions
Web CEO Ltd.
Department Of Posts
PaperCut Software Pty Ltd
Tencent Technology (Shenzhen) Company Limited
Zimbra and VMware, Inc.
Stellar Information Systems Ltd.
Sourcebits Technologies Pvt. Ltd.