Using Imgur, Postimage, TinyPic, etc. is probably the way to do what you want.Although not written for this forum, Posting images in the Bogleheads forum - Bogleheads gives the general idea.
Why can"t I preview my attached picture?
Nope still can't preview. I typed some text, attached the picture, clicked preview, text is there, picture is not.But when I post it, the picture is there.