Many people are sending HTML e-mail for no obvious reason or benefit. HTML e-mail can be recognized by colored backgrounds or typefaces. It sometimes has designs or other decorations in the messages.

I’m somewhat “old school” when it comes to my e-mail messages. I like to see them in plain text, without any Web page (HTML) markup, fancy colors, background images, font changes, or other garish ...

The WordPress WP HTML Mail plugin, installed in over 20,000 sites, is vulnerable to a high-severity flaw that can lead to code injection and the distribution of convincing phishing emails. 'WP HTML ...

Over the past few days, we've been covering reports of incompatibilities between Safari and the newly "upgraded" Yahoo! Mail system. Our coverage has generated a significant amount of reader feedback ...

The mime type of the attachment has to identify it as HTML. I believe it will default to plain text. I'm not sure how that could be done.