My Seller Pal supports adding an image to your email body. To do this, you will have to upload the image to an external photo uploader app like Imgur. Below are the detailed steps to follow.
But before you add any image or GIF on your email, be sure you wouldn't violate Amazon's Terms of Service (TOS) on buyer-seller emails. For help on understanding Amazon's TOS, click here.
1. Choose the image or GIF that you want to include on your email and upload it to Imgur
a. Go to Imgur. Create an account if you don't have one yet.
b. Click on your account name and choose "Images".
c. Click on "Add Images".
d. Click "Browse" or drag the image. You can also paste an Image URL.
e. Click on the image.
f. Copy the Direct link.
2. Go to your My Seller Pal - Buyer Email Body.
For detailed steps on how to create and set up your email autoresponders click here.
5. On the Detail tab, paste the Imgur link on the Source field.
6. Click OK.