On: Did we forget about HTML-emails?

[yuhong]

So much that most email clients disable images by default and have been for years to help prevent abuse by spam.

[Jach → yuhong]

And if it's actually important or you're curious or you can't read it and want to know what it says, you'll click the "show images" button. Email tracking is hardly a bad thing, it provides useful data. Some address never reading emails/never showing pictures? Stop sending them stuff.