CSS Not Supported in Microsoft Outlook Windows App

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CSS Not Supported in Microsoft Outlook Windows App

Sacchidanand Kumar 0

Dear Microsoft Support Team,

I am experiencing an issue where CSS is not being properly applied in the Microsoft Outlook Windows app. The same email renders correctly in web-based email clients and even in Outlook on other platforms, but in the Windows app, styles are either missing or not applied as expected.

This issue significantly affects the appearance and readability of emails, causing formatting inconsistencies and layout issues. I have tested inline CSS as well, but it does not seem to resolve the problem completely.

Could you please provide guidance on the supported CSS properties for the Outlook Windows app? Additionally, if there are any planned updates to improve CSS compatibility, I would appreciate any information regarding the timeline.

Looking forward to your response and a possible resolution.

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Answer 1

ChristyZhang-MSFT 25,696 Microsoft External Staff

Hi @Sacchidanand Kumar ,

Welcome to our forum!

Looks like your case is more related to development, please kindly understand that many functions are not designed at present. To get this feature more quickly, I have found a post in feedback collection website and you could vote for it. Many features of our current products are designed and upgraded based on customers’ feedback. You can also make suggestions on that website and hope Microsoft will notice this in the future.

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Sacchidanand Kumar 0 Reputation points

2025-03-12T08:45:01.69+00:00

I'm facing an issue where CSS styles are not properly applied in the Microsoft Outlook Windows app. The same email renders correctly in web-based email clients and even in Outlook on other platforms, but in the Windows app, certain styles appear to be missing or ignored.

This inconsistency significantly impacts the visual presentation and readability of emails, causing formatting issues. I have also tried using inline CSS, but it hasn't completely resolved the problem.

Could you provide details on which CSS properties are currently supported in the Outlook Windows app? Additionally, what are the best practices or workarounds to ensure emails display correctly in this environment? Are there any recommended techniques, such as using tables for layout or specific inline styles, to improve compatibility?

Lastly, do you have any planned updates to enhance HTML and CSS support in the Outlook Windows app? If so, could you share an estimated timeline for these improvements? Ensuring better CSS rendering would greatly improve the email experience for users.
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CSS Not Supported in Microsoft Outlook Windows App

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