I'm trying to send jpeg files on Outlook 2007, and it keeps being received as winmail.dat. I've searched online on solutions, and all the articles I've found said that instead of sending in rich text, I have to send in plain text or HTML to solve the problem. Well, I'm sending in HTML, and that's my default, and the problem still exists. It's fine if I send in plain text but I want to send in HTML.
I don't recall changing any settings, and this problem only started today. I'm using Windows 7, if that changes anything.