Webmail (or web-based email) is an e-mail service intended to be primarily accessed via a web browser, as opposed to through an e-mail client. Popular webmail providers include Gmail, Yahoo! Mail, Hotmail and AOL.
A major advantage of web-based email over application-based email is that a user has the ability to access their inbox from any Internet-connected computer around the world. However, the need for Internet access is also a drawback, in that one cannot access their old messages when they are not connected to the Internet.