With any automated property panel in the email builder, you can choose to filter properties to exclude those listed as under offer.

To do so, starting in the email editor, drag and drop in a property panel if you haven't already, or click on an existing property panel to make it active. From here:

• In the panel editing toolbar, make sure that the Feed Toggle is in the on  position, to automate populating the panel.
• Select Define Properties

• Within Define Properties, stay on the Basic sub menu;
• Tick Exclude properties marked as under offer (1).
• Select Update to save your changes.

Note: This effects this panel only, so if you want to exclude them from other property panels in your email, just repeat this process.