That said, "the actual percentages aren't really all that important here," stresses Pingdom. "What's important to note is that the subdomains used for Webmail
have a ranking near or at the top for all three companies." In other words, "Imagine the hit to their Web presence if they didn't have these webmail services." Citing traffic from Google's Doubleclick
Ad Planner, Pingdom reports that Yahoo Mail has 340 million users worldwide, and Hotmail has 450 million users worldwide, while Gmail is believed to have roughly 200 million users around the globe.
"Imagine if one of these three companies would somehow lose their webmail service," Pingdom pictures. "It would be a disaster for them."