Make dynamic code work in Inbox Previews.
Right now, all dynamic code is rendered literally in Inbox Previews, which doesn't make them particularly useful for testing emails with dynamic code.
Our Inbow Preview system works by sending a test delivery of your message to our testing provider (Litmus) and they render it in all email clients. This test delivery is the NON personalized version of your content. Meaning it will be the if-empty rules or the all-other rules. At this time there is no plan or method to change this, but it does not rule out a third-party App in the future.