Yesmail-Email-CTO-by-Industry-and-Device-in-Q2-Aug201349% of email opens happen on a mobile device, says Yesmail Interactive [download page] in a new study examining more than 5 billion emails it sent during Q2. But while mobile opens become increasingly widespread, interaction levels on mobile devices lag comparable rates on desktops by a considerable margin. In fact, across 11 industries analyzed, the click-to-open (CTO) rate for emails opened on desktops was roughly double the rate for those opened on mobile devices (22.6% vs. 11.1%).

via Average Email Click-to-Open Rate Twice as High on Desktops as on Mobiles.