Office 365 received the message that you specified. Unfortunately, we couldn't deliver the message to the recipient ({0}) due to a problem on your organization's mail server. Validation for your server's certificate failed. We kept trying to send the message for 48 hours, but finally gave up. Details are in the following section.
Office 365 received the message that you specified, but delivery to the recipient ({0}) has been delayed. We're working on ...
Office 365 received the message that you specified, but it wasn't delivered to the recipient ({0}). That's because an admin ...
Office 365 received the message that you specified, but it wasn't delivered to the recipient ({0}). That's because an admin ...
Office 365 received the message that you specified. Unfortunately, we couldn't deliver the message to the recipient ({0}) ...
Office 365 received the message that you specified. Unfortunately, we couldn't deliver the message to the recipient ({0}) ...
Office 365 received the message that you specified. Unfortunately, we couldn't deliver the message to the recipient ({0}) ...
Office 365 received the message that you specified. Unfortunately, we couldn't deliver the message to the recipient ({0}) ...
Office 365 received the message that you specified. Unfortunately, we couldn't deliver the message to the recipient ({0}). ...
Office 365 received the message that you specified. Unfortunately, we couldn't deliver the message to the recipient ({0}). ...