Yahoo is rolling out the newest version of its e-mail service and inviting all of its 284 million users to upgrade.

After seven months in beta, Yahoo Mail launches, offering more social-networking tools and apps from partners such as YouSendIt and Evite baked into the service.

SAN FRANCISCO — Yahoo Inc. is giving its popular email service a long-promised facelift in an attempt to make it more appealing to people who are increasingly using Facebook, Twitter, Google and other online alternatives to communicate. The changes announced Tuesday build upon a redesigned email format that Yahoo began testing seven months ago. The estimated 277 million users of Yahoo’s free ...

Yahoo Inc. is giving its popular email service a long-promised facelift in an attempt to make it more appealing to people who are increasingly using Facebook, Twitter, Google and other online alternatives to communicate.

Yahoo announced late on Monday that it is ready with a final version of its updated mail software in an effort to regain momentum in the free Webmail arena, where it competes with Google and Microsoft.

Yahoo took too long to disclose an ownership change in its Asian assets that caused a 12 percent slump in the company's stock, investors said. It took Yahoo more than five weeks after learning of the deal to inform...

Yahoo started rolling out homepage takeover ads this past weekend for Disney’s Pirates of the Caribbean: On Stranger Tides as the it and the other major portals are working to line up marketers for these “premium” ad slots.

Yahoo! Inc. took too long to disclose an ownership change in its Asian assets that caused a 13 percent slump in the company’s stock, investors said.

Yahoo! Inc. took too long to disclose an ownership change in its Asian assets that caused a 12 percent slump in the company’s stock, investors said.

Yahoo’s product chief, Blake Irving, told employees to “celebrate success, not launches.” The company has focused on improving existing services, like Flickr.