Images to Email

I've been working on this and it seemed to be working at first but I've found it doesn't work with all email clients. I can place images in the ckeditor content and send it as an email, but without attaching the image to the email, it only shows a broken image in most email clients. So, I guess I need to attach the images from the body of my document to the email message in my c# code. Does anyone have a good way to do this or should I just search the string and attach them using substrings?