How can I force email programs to show images send in html email using php?

Question

I am sending an html email with php and it includes an image. Some email programs, such as gMail have a \'display images\' button. The user has to click on that in order for

Answer 1

You can, but unfortunatley Trident, which is the IE rendering engine doesn't support it (surprise, surprise), but it is technically possible to include images in the html itself - see http://en.wikipedia.org/wiki/Data_URI_scheme