Yahoo! Mail is upgrading: What it means for you.

Yahoo! Mail Beta works best with these browsers:
Internet Explorer 8, Firefox 3 and newer, Safari 4 and newer, and Chrome 5. Need to update your browser? Download the latest for free

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• Speed – Yahoo! Mail Beta is faster than previous versions of Yahoo! Mail; exact speed will vary based on internet connection, browser, device, user location, and user action.
• Spam – We continually improve our advanced spam protection technology to help protect your inbox from unwanted messages.
• Unlimited Storage – Consistent with Yahoo! Mail terms of service. Learn More.
• Mobile – Device must have an active internet connection for user to access e-mails.