The old Outlook.com CSS support depends on case

[hteumeuleu]

Outlook.com filters some properties depending on their case. For example, Outlook.com supports Margin:0; but not margin:0;. I tested every properties based on this list, and 19 properties affected by this behavior. Some will only work when written in lowercase. And others will only work when written in anything but lowercase.

Properties only supported in lowercase :

• alignment-baseline
• baseline-shift
• clip-path
• color-interpolation-filters
• flood-color
• flood-opacity
• image-rendering
• lighting-color
• mask
• opacity

Properties only supported in anything but lowercase :

• Float
• Margin
• Margin-bottom
• Margin-left
• Margin-right
• Margin-top
• Outline
• Position
• Z-index

[hteumeuleu]

This only happens in the old Outlook.com. The new Outlook.com / Office 365 doesn't have this bug.

[hteumeuleu]

The newer version of Outlook.com doesn't have this bug. The old Outlook.com should be completely obsolete, so I'm closing this bug.