Storage
The Gmail service currently provides more than 10 GB of free storage per account.Users can rent additional storage (shared between Picasa Web Albums, Google Docs and Gmail) from 25 GB (US$2.49/month) to 16 TB (US$799.99/month).[18] On April 1, 2005, the first anniversary of Gmail, Google announced an increase from 1 GB. Georges Harik, the product management director for Gmail, stated that Google would "keep giving people more space forever."
On April 24, 2012, Gmail announced the increase of free storage in Gmail from 7.5 GB to 10 GB (and counting) as part of the launch of Google Drive.
Gmail Labs
The Gmail Labs feature, introduced on June 5, 2008,allows users to test new or experimental features of Gmail, such as bookmarking of important email messages, custom keyboard shortcuts. Users can enable or disable Labs features selectively and provide feedback about each of them. This allows Gmail engineers to obtain user input about new features to improve them and also to assess their popularity and whether they merit developing into regular Gmail features. All Labs features are experimental and are subject to termination at any time.
Spam filter
Gmail's spam filtering features a community-driven system: when any user marks an email as spam, this provides information to help the system identify similar future messages for all Gmail users. Users may tune the system to allow mail marked as spam to be handled in particular ways.
Gmail Mobile
Gmail Mobile is a version of Google's Gmail email service. It is a free service, developed to provide access to Gmail from mobile devices such as cell phones, or smartphones. Gmail Mobile offers many of the features as Gmail delivered effectively to smaller, mobile screens. Users have the ability to compose, read, archive, reply, forward, mark unread, add a star, add custom labels or trash email messages.On September 22, 2009 Google brought Push Mail support to its Gmail service using Google Sync for iPhone and iPod Touch platforms.
In order to use the service a user will need a Gmail account and a mobile device that meets the following requirements:
It must have Internet access and a WAP enabled web browser
It must be XHTML compliant
It must have cookies enabled and the mobile network must also allow cookies to be set
It must allow SSL (Secure Sockets Layer) traffic.
Gmail Mobile was released on December 16, 2005, and is available in more than 40 languages.]
Google Buzz
Main article: Google Buzz
On February 9, 2010, Google commenced their new service, Google Buzz, which integrates with Gmail allowing users to share links and media, as well as status updates. Buzz was launched with an automatic opt-in, causing an uproar in the Gmail community which led Google to quickly undo its initial moves. Buzz was discontinued in December of 2011.
Google Voice in Gmail chat
Main article: Google Voice
In August 2010, Google released a plugin that provides integrated telephone service within Gmail's Google Chat interface. This service initially lacked an official name, with Google referring to it as "Google Voice in Gmail chat" and also "Call Phones in Gmail", but is now called Google Video and Voice Chat. The service allows people to make free calls from their Gmail account to U.S. and Canada, at least through the end of 2012. Gmail account users can also call other countries on a fee basis.]
The service logged over 1 million calls in 24 hours on 26 August 2010.
Offline Google Mail
On August 31, 2011, it was announced on the Official Gmail Blog that Offline Google Mail was launched as a Chrome web app at the Google Chrome Web Store. This HTML5-powered app is based on the Gmail web app on tablets.
On April 11, 2011, Google engineer Sundar Pichai revealed that Google employees had been testing the app together with offline versions of Google Docs and Google Calendar for months and that the apps would be launched in the summer of 2011.
Gmail Search
Gmail has the integrated search function that resembles Google Search but only searches a user's Gmail account. On May 21, 2012, Gmail improved their search functionality to include autocomplete predictions from the user's email content.
Security Warnings
On June 5, 2012, a new security feature was introduced to protect users from state-sponsored attacks. Whenever Google analyses indicate that a government has attempted to compromise an account, Gmail will display a notice that reads "Warning: We believe state-sponsored attackers may be trying to compromise your account or computer".