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A Guide to Rendering Differences in Microsoft Outlook Clients

Microsoft has a long and complicated history with the email world. From founding the first free webmail service to building several variations of desktop mail programs, the tech giant’s influence on both business and consumer email messaging is vast. Over the years, Microsoft has expanded the “Outlook” brand to encompass nearly every email project it touches, leaving email industry pros puzzling over seemingly dozens of products using similar naming conventions—not to mention their associated rendering and support quirks.

Mobile Opens Hit 44% and Outlook.com Takes a Dive

Outlook.com is back to shake things up in our June email opens report. Outlook.com first came screeching onto the scene in April, showing up in the #7 spot as Hotmail was retired. The following month we saw a 20% increase in opens as Outlook.com dethroned Apple Mail for the long-held #4 spot. And now, just […]

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Outlook.com Increases Market Share by 20%; Soars to #4 Spot

We’ve seen the same names appear again and again in our email client market share reports in the past year. May marked a pivotal turning point with a surprising upset in the top five. iPhone, Outlook, and iPad continue to top the charts—no surprises there. The big upset was courtesy of newcomer Outlook.com. We covered the […]

Outlook.com Breaks into Email Client Top Ten at #7

While market share stats have mostly held steady over the past few months, there were some exciting changes in April. Not surprisingly, iPhone, Outlook, and iPad continue to top the charts; however, we’ve seen some major changes in the bottom half of the top ten: Yahoo! Mail moved from #7 to #6 Yahoo! Mail Classic […]

Hotmail and Outlook.com Drop Support for Margin

You may have noticed your emails looking a little cramped in Hotmail and Outlook.com recently. The culprit? Discontinuation of support for the margin property in these email clients. Rather than honoring your carefully spaced paragraphs and images, Hotmail and Outlook.com are now completely stripping margin from paragraph tags, leaving default values (0 for the top, right and […]

New Email Client Available: Outlook.com!

We are thrilled to announce that Litmus is offering email testing and interactive testing for Outlook.com! Earlier this week, Microsoft announced that Outlook.com will be the new home of Hotmail users—all hundreds of millions of them. After hearing the news, we started working on getting screenshots and Interactive Testing available for Outlook.com. Today we are pleased […]