Gmail is the most popular email service provider in the United States, and the iPhone is the most commonly used device for accessing email, according to recent research from SendGrid.

The 2018 Global Email Benchmark Report was based on data from more than 50 billion emails sent by more than 100,000 senders to more than 2 billion recipient addresses.

Some 42% of the US emails addresses examined were Gmail accounts, 16% were Yahoo accounts, and 6% were Hotmail accounts.

Although Gmail is the most popular inbox provider worldwide, the proportion of consumers using the service varies widely from country to country, the analysis found. For example, Gmail accounts for only 22% of recipients in Germany—but 82% in India.