I can create rounded corners in many clients with
style=\"-moz-border-radius: 15px; border-radius: 15px;\"
However this CSS does not create
This code produces buttons with rounded corners in Outlook 2010 using the Outlook conditional comments () and VML:
Tested in Outlook 2010 and major browsers only, not OWA, Outlook.com or any mobile browsers. It's worth a closer look. Credit where due -- http://www.industrydive.com/blog/how-to-make-html-email-buttons-that-rock/