Microsoft still leads the race... There is a tough Competition between yahoo and Microsoft... but now there is another competitor in the race. it is google Microsoft is the first largest e-mail service, with 283 million users Yahoo is the second largest e-mail service, with 274 million users Gmail is the third-largest e-mail service, with 113 million worldwide users as of September according to comScore. Google announced Tuesday it is adding video and audio chat to its free e-mail service, joining Microsoft and Yahoo in a race to make communication on the Web a more social experience. Both Microsoft and…