By default AOL uses it’s own font styling. The fix is very simple and can be overwritten using your own embedded CSS.
HTML Email Knowledge Base
Remove vertical spacing between images in Mozilla Thunderbird
If you have set an align attribute in an image to right or left, Thunderbird will add a 3 pixel margin these images.
Optimizing the Accessibility of HTML Emails
The accessibility for HTML emails is often overseen, however, with a few tweaks can greatly improve a readers experience using assistive technology.
Target Windows 10 Mail App using Conditional Comments
Just like the Outlook email client, you can target the Windows 10 Mail App using conditional comments.
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.
