DPI Scaling fix for Outlook 2007-2013
You may find that your emails fonts are much larger and tables appearing folded together. Luckily there is a way to fix this problem in Outlook!
Status: Legacy Email Client Support
Target Yahoo! Mail Android using CSS Media Queries
How you can have styles that only target the Yahoo! Mail Android app, using a simple workaround.
Target Yahoo! Mail iOS using CSS Media Query
You can target the Yahoo! Mail iOS app by using the @media yahoo and adding a max-width to the media query.
Target Outlook.com using the [owa] Element
You can target Outlook.com by using a CSS element called [owa] (Outlook Web Access), which is part of Outlook.com
Target AOL Mail using .aolmail_ CSS Class
You can target AOL Mail by using the CSS selector class .aolmail_ and adding your styles.
