In comparison, web users opened 32% of emails using a desktop client such as Outlook or Apple Mail and 21% opened emails via a webmail service, such as Gmail, accessed in a web browser. Litmus also noted that Gmail’s May introduction of its new tabbed interface, which uses an algorithm to separate out promotional messages into its own channel, had caused concern among email marketers. The Litmus study found that a significant share of Gmail opens occurred on mobile devices, with 54% of Gmail emails opened on either an iPhone or Android device, and another 9% opened on the iPad. Only 19% of Gmail opens occurred via Gmail on the web. The convergence of Gmail tabs and mobile opens will be among the most important trends for email marketers to pay attention to going forward. The new version of Gmail does not yet have complete penetration however; Litmus found that less th Get the full story at eMarketer