Wikipedia
MobileMe (formerly .Mac and iTools) was a subscription-based collection of online services and software offered by Apple Inc. All services were being gradually transitioned and replaced by iCloud and the service ceased as of June 30, 2012, with transfers to iCloud available until July 31, 2012. Afterwards, all data was deleted, and the email addresses of accounts not transferred to iCloud were marked as unused.
Originally launched on January 5, 2000, as iTools, a free collection of Internet-based services for users of Mac OS 9, Apple relaunched it as .Mac on July 17, 2002, when it became a paid subscription service primarily designed for users of Mac OS X. Apple relaunched the service again as MobileMe on July 9, 2008 at the Apple Worldwide Developers Conference (WWDC) 2008, now targeting Mac OS X, Microsoft Windows, iPhone, iPod touch and iPad users.
On February 24, 2011, Apple discontinued offering MobileMe at its retail stores, with MobileMe retail boxes eventually removed from resellers as well. Additionally, Apple stopped accepting new subscriptions for MobileMe. On June 6, 2011, Apple announced that a new service called iCloud would replace MobileMe sometime in the fall. At the iPhone 4S special event on October 4, 2011, Apple announced it would finally launch iCloud on October 12, 2011, to replace MobileMe for new users, with current users having access until June 30, 2012 (on that day the service would cease).
MobileMe was shut down on June 30, 2012, with user data available for retrieval until July 31, 2012, when the site finally closed completely.