There may not be values in data fields used for personalization, and/ or no “fallback” (standardized general personalization) has been provided. An example: you would like to have a personalized salutation like “Dear Mr Doe” but there is no value in the contact field “salutation” or “lastname”. The required fallback, e.g. “Dear Ladies and Gentlemen” has not been provided.
Posted in: Maileon @en