I am building a small email application that will allow my clients to send bulk emails to their customers. I have used HTML emails before but each time I want a product image to appear on the page I reference a URL (http://www.elro.ie/Image.gif
). I recently received an email that had an image embedded in it with no reference to an online gif or jpeg. The code appeared like this:
<IMG alt="" hspace=0 src="cid:45524925" align=baseline border=0>
What is the cid reference? Thanks.