Just like the Outlook email client, you can target the Windows 10 Mail App using conditional comments.
HTML Email Knowledge Base
Target Mozilla Thunderbird using .moz-text-html CSS Class
You can target the Mozilla Thunderbird email client by including the CSS class .moz-text-html, which Thunderbird wraps around the contained email.
Target Outlook Email Clients using Conditional Comments
Using conditional comments you can target different versions of the email outlook client and include your client specific HTML.
List of Gmail supported CSS Properties & Media Queries
A list of all CSS properties supported in Gmail and Inbox.
Remove gaps between tables in Outlook 2007 and 2010
Outlook 2007 and 2010 can be a little tricky when it comes to stacking tables side by side or top to bottom, where you may see some undesired gaps between your tables.
