How can I compose a raw source email and paste my own HTML into it using Mac Mail? I see the option to view messages in my inbox in raw source code but not to compose a new email and paste in HTML for it. Anybody know?
Mail doesn't support HTML email for sending messages, at least not directly. You can copy and paste HTML output from a browser or WYSIWYG editor, and it will usually appear correctly, but if you want to create pure HTML mail, you should probably look into another email program that would support it directly. It'll save you a lot of headaches.