On the Message Editor in GroupMail. Click on the Image that you have inserted into your Message
Then go to the Insert Menu, Hyperlink
Link Text :
Type : http://
URL : http://www.infacta.com In this example I have entered http://www.infacta.com you need to enter the URL that you wish to open when someone clicks on this image here please.

Now when your message is received and someone clicks on this Image it will bring them to the URL you enter above.