Your message couldn't be delivered to the recipients shown below. When Office 365 tried to send the message to the recipient (outside Office 365), the recipient's email server (or email filtering service) suspected the sender's message is spam. If the sender can't fix the problem by modifying their message, contact the recipient's email and ask them to add your domain name, or the sender's email address, to their list of allowed senders. Although the sender may be able to alter the message contents to fix this issue, it's likely that only the recipient's email can fix this problem. Unfortunately, Office 365 Support is unlikely to be able to help fix these kinds of externally reported errors.
