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In 2012, Gmail overtook Hotmail to become the most popular email provider in the world. Since claiming the crown, it’s showing no signs of slowing down. Today, the service boasts more than 1.8 billion users. The other go-to free email provider is Yahoo Mail. Sure, its user numbers pale into insignificance compared with Gmail (around 230 million active users), but it’s still one of the most recognizable global email brands.