Guide to CSS support in email - Articles & Tips. Version history 14 November 2017 Outlook.com and the Outlook iOS app added support for CSS background images and some related properties, as well as certain Flexbox and Grid properties.
Also added iOS 11 Mail to the guide, with no noticeable differences from iOS 10. Premailer: pre-flight for HTML email. Comment on, edit, and fill PDF files, Word documents, images and more.
Clientside.