The desktop version is similar to Outlook 2007-2019 and uses Word as a rendering engine (hard for email). There are two different versions of Outlook Office 365: These clients use Webkit or Webkit-based rendering engines, so they provide good HTML rendering and don’t usually break your emails. If it looks good in your browser, there’s a decent chance it will look good in Outlook for Mac and you’ll have less chance of your html email not displaying properly. This means it’s usually on par with Apple Mail and iOS as far as email rendering is concerned. This is the Mac desktop version of Outlook. Unfortunately, this can wreak havoc on your email. If they do, the desktop email clients will respect that and will update images and text to be larger.

Windows users can choose 120 DPI to increase their screen resolution. (Ah, simpler times.) But, for email marketers, it doesn’t cut it for rendering Outlook HTML emails.ġ20 DPI (dots per inch) adds to the complexity. These use Word as the rendering engine, which made sense at a time when email was like writing letters.

These are the Windows desktop versions of Outlook. Let’s dive in to the different Outlook versions. All of this can be a giant headache if you let it. The name “Outlook” covers several different email clients with a couple of different rendering engines and at least two different viewing settings.

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