With more people gravitating to Gmail, Microsoft also recently redesigned Hotmail and rebranded the service as Outlook.com — a reference to the communications channel built into the software maker's widely used Office suite of programs.
In a sign Google isn't taking its lead for granted, the company is the in process of phasing in changes to Gmail that will give it a slightly different look and add more features.
All the retooling underscores the ongoing importance of traditional email. Yahoo says it still processes about 30 billion emails each day and estimates its users collectively check their inboxes about 190 million times per day.
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