A constituent reported to us that they are receiving this error message after we tried sending an email message from Luminate: "This message cannot be displayed because of the way it is formatted. Ask the sender to send it again using a different format or email program."
This message was generated by the recipient email server because they rejected the email message due to the formatting of the email. The issue needs to be addressed by whoever manages the recipients email server. For example, the incoming mail server might have rules in place to reject any message that contains specific HTML or CSS characteristics.