Thanks for the idea. Due to the variety of ways a Recipient can be defined (manual, data source, etc.), it is not possible to provide a delete option at the Destination tab level.
Please disregard my last. This feature has been deemed feasible and will be included in InfoBurst 2022.4.
Thomas Nather
if each email had a trash can to delete that email it would save 3 clicks to remove each email.