Image in an email that goes to a webpage.

I want to send an image in an email to lots of people. I want the image to be linked to a website so they can click on the image and it will go to that website. The image is different than the images on the website. In other words, you recieve an email that has a picture in it. You click on the picture and you go to the website. How do I do that simply as I am not very good with the html?

Thanks in advance for any help.

PS I read the previous thread about linking an image to a website, but, what I am talking about is located within an email.
I hope I have explained this so it can be understood.