OrderlyEmails allows you to add sections to your emails, including images and GIFs. Here's how:
1- Login to OrderlyEmails (Shopify admin -> Apps)
2- Click the "Customize" button on your design
3- In the editor, go to the "Sections" tab
4- Click "Add section" at the bottom of the sections list
5- Select the "Image" section and click "Add"
6- Upload your image file.
Supported file formats
JPG, JPEG, PNG and GIF. Email does not support SVG image files.