I saw this on Volker Weber’s blog today and recalled a similar study last year which sparked a bit of a debate. Overall, I don’t get the point of surveys like this. The method of surveying is fundamentally flawed. As e-mail clients get better at blocking the loading of remote images, and users get more aware of the consequences, the results will be showing not the most popular e-mail clients but clients owned by people who are either prepared to load the images or using e-mail clients which don’t block them.
Furthermore, people rarely have just one e-mail client now… you’ll probably have one at work, one for personal use, and one on a mobile device. So if someone opens a survey e-mail on an iPhone, it doesn’t mean they don’t use another e-mail client in other situations.
It’s likely that these survey e-mails register as spam, so their rate of delivery to business-based mail boxes is very low. A colleague noted that Lotus Notes was nowhere to be seen in the results (and therefore less than 1%) – but this can easily be explained by the same reasons I went through last year. You’ll also note that BlackBerry doesn’t feature – RIM’s market share may be falling, but it’s still large enough to expect them to appear in the results. Maybe it’s done just so they add provide a link to their analytical tools.