Hi guys, i followed this https://developers.suitecommerce.com/customize-web-store-emails-with-freemarker.html but the images are not being displayed using:

${itemimages[itemline.item.internalId]}

as the image src. Any ideas why?

Hard to say. Instead, look at some of our default templates and try those out. If they work, then there may some differences in the syntax I used in my example compared to what works for your account