As we know the Outlook service doesn't support media queries and has issues with displaying buttons, background images, and other elements of an email.
For more details about all the Outlook "pitfalls", click here.
For this specific service, we recommend activating the "Support for Outlook" control in the "General Styles"→"Buttons" menu.
This option ensures the most accurate display of your buttons in MS Outlook email clients by inserting a special VML-code element.
Let's create an email with rounding buttons and see how it looks with the connected Outlook button's control and without it.
Here is our email, I set 20px for the border-radius:
Then I exported the email to Outlook and as you can see we have an issue with the buttons displaying, they are small, square and the text changed its formatting.
Now, let's enable the Outlook button's control and export the email again.
As you can see the buttons displaying properly.
So when you are going to export your emails to Outlook don't forget to connect this control for Outlook buttons.
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