One of my attributes is priority, it is an enumeration with values from 1 to 3. 1 being the most important. I would like my email to be painted red if the enumeration is 1 for example. Any ideas?
Which e-mail module are you using? If you're using one that allows you to work with templates, I would create a decision in the flow that retrieves the template based on your enum values, and then retrieve the template that has the correct colour for your enum value.