How to Create HTML-Based Email in Yahoo. Yahoo Mail supports both plain text and rich text (HTML) email composition. There are benefits and detriments for each method, but if you want to use ...

If you use Microsoft Office Outlook 2010 to manage all emails in your small business, consider creating an HTML email signature.

In previous versions of Microsoft Outlook (the classic app), you could view the HTML code of an email by opening the email, right-clicking on it, and selecting “View source” from the context menu.

The Mailto Chrome extension can make most webmail services your default mail client in Chrome. If you want to use a service other than Gmail, install the Mailto: extension from the Chrome Web Store.

And they correctly note that this problem could make advanced HTML email trickier for marketers and other people who need or like to use HTML email.