Gmail is a free and also an advertising-supported email service which has been developed by Google. In general, Gmail has been accessed by the users via the web and also using the third-party programs that synchronize an email content through the POP or IMAP protocols. Gmail has been started as a limited beta which was released on April 1, 2004, and can be ended its testing phase on July 7, 2009.
At the time of launching, Gmail had an initial storage capacity offer of only one gigabyte per user, a significantly higher amount than the competitors offered during that time. But now, the service has increased its storage capacity up to 15 gigabytes of storage. Commonly, users can receive emails up to 50 megabytes in size, including the attachments, while they can send emails up to 25 megabytes only. If the users want send larger files, then they can insert files from Google Drive into the message. It has a search-oriented interface and also a “conversation view” similar to an Internet forum.