how do i upload JPG images into auto responder emails? It seems that they only accept URL images

Unfortunately, it is not possible to upload images directly to auto-responders/notifiers. However, you may use any free image hosting service to get URL of the image uploaded to paste it in the image URL section. Here is one of the good and simple websites to upload images. http://www.postimage.org/

You may also use the workaround provided in this thread. 

Hope this information helps. Please get back to us if you need further assistance. We are happy to assist you.