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If that test message is received, the issue is likely with the original email's content. You can test if the content of your email is what's causing the block by sending a plain-text email with no attachments to a single recipient. Your email might have been considered spam by a spam filter or firewall.
Wait a few minutes and try resending the message.Įrrors that include: Blocked, Denied, Access denied, Unacceptable Content, or similar messages. Check the recipient email address for typos. If someone is trying to email you and gets one of these errors, you might need to update your MX records. This issue usually goes away on its own or you can try again later. Sometimes the person you're trying to message can't receive email, or their inbox or receiving folder might be full. Common reasons for email bounces Rejected by the recipientĮrrors that include: Mailbox unavailable, Undeliverable, Connection timed out, or similar messages. The area outlined in red is the reason for the error. This is how an error might look in Outlook, though your error message could look different depending on the email provider rejecting the message. The bounce error will show in the received message. Read this error to understand what caused the issue and how to resolve it. When a sent message can't be delivered, it bounces or comes back with an error message (also called a bounce back) that describes the reason delivery failed.