HTML Email considered Evil
My Wife is currently fuming in the other room because she sent the wrong signup link to several business partners, because someone editing that the link did so in an HTML/Rich Text editor, and ended up editing the text of the link, not the source. So she sees the correct link in her editor/email, but in fact she’s sending someone else’s affiliate link.
I pretty much only use plain text email, and this is one reason - if it’s not spam or phishing, it’s simple ignorance.