Many people have problems with emails in reactive to get the formatting they want. I could create an example that works. See the idea https://www.outsystems.com/ideas/11821/enable-using-html-content-in-email-body-in-reactive-app/ And the forum https://www.outsystems.com/forums/discussion/76882/outsystems-email-templates-reactive-emails-in-outlook/ If you want to add more HTML (e.g. a graph) inside the email than you will run into the issue that it is not possible to insert HTML in the reactive email. What however is possible to put all you extra stuff in an anonymous screen and output it as a PNG file by using UltimatePDF. This PNG binary data can then be send to the reactive email and display it as a image with type BinaryData. I am not able to upload it because the oap is around 390kb and OutSystems limits the oap size to 256 kb.