Gmail is a free, advertising-supported email service developed by Google. Users can access Gmail on the web and through the mobile apps for Android and iOS. Users can also access their GMail accounts through third-party programs that synchronize email content through POP or IMAP protocols.
Gmail was released as a beta version in 2004. Gmail at launch had an initial storage capacity offer of 1 gigabyte per user, a significantly higher number than the 2 megabytes of storage its competitors such as Hotmail offered at that time. Today, the service comes with 15 gigabytes of free storage. Users can receive emails up to 50 megabytes in size, including attachments, while they can send emails up to 25 megabytes. In order to send larger files, users can insert files from Google Drive into the message.