In November 2010, the number of U.S. visitors to web-based email sites declined six percent compared to the previous year, while the number of users accessing email using their mobile devices grew by 36 percent, comScore reports.g
“From PCs to mobile devices, whether its email, social media, IM or texting, consumers have many ways to communicate and can do so at any time and in any place," says Mark Donovan, comScore senior vice president of mobile.
The decline in web-based email is a byproduct of these shifting dynamics and the increasing availability of on-demand communication options.
The broad conclusion might be that people are using email less, but when they do so, it is likely to be on a mobile device. That isn't likely to matter much for person-to-person or person-to-multiple-person messaging. But it will be significant for email marketers, who no longer can assume their messages are received on a larger-screen PC, with ability to display images natively, for example.