Zip files with creative information now supported to be uploaded for email messages. The zip file can contain either a creative with multiple images, Multiple creatives, Multiple images or any combination.
For instance you can upload a zip file with an html file and the associated images. The creative will be added to the add message page. The images will be saved to the image hosting page and if the images are not linked up in the creative the creative will be updated with the new image hosting links.