#Fix mtasa cd 46 error Offline
The destination email server is offline or unreachable. Only after two days of unsuccessful delivery attempts do the recipient receive this NDR.
Exchange Online repeatedly tries to deliver the message over 24 hours.
#Fix mtasa cd 46 error code
x.x error code that indicates the message was rejected). This can result in a temporary 4_.x.x_ error code from the destination email server (instead of a permanent 5. When Exchange Online attempts to deliver a message, the destination email might be unable or unwilling to accept the message. They might need to rerun the Hybrid Configuration Wizard due to changes in their on-premises IP addresses or firewall rules.įor more information about message routing in hybrid deployments, see Transport routing in Exchange hybrid deployments. Give the information in the NDR to your on-premises Exchange administrators. Solution 5: If the recipient is in your on-premises Exchange organization in a hybrid deployment, there might be a problem with your hybrid configuration. Verify with your domain registrar that your domain is active and not expired. Solution 4: Your domain might have expired due to non-payment. For more information, see Set up SPF to help prevent spoofing. Solution 3: The Sender Policy Framework (SPF) record for your domain might be incomplete, and might not include all email sources for your domain. Solution 2: Test your MX record and your organization's ability to send mail by using the Outbound SMTP Email test in the Microsoft Remote Connectivity Analyzer. Get more information about how MX records work at DNS basics.
Solution 1: The MX record for your domain might be missing or incorrect. If the admins in the destination domain determine the problem isn't on their end, the solution might be related the configuration of your Exchange Online organization (or also your on-premises Exchange organization if you're in a hybrid deployment). Microsoft support might also be able to help. Stop blocking messages from Exchange Online or specifically allow messages from senders in your domain.Ĭontact the support channels for their email server or service. The email admins in the destination domain will need to investigate the issue. The number of delivery attempts made that were made by the datacenter server in Exchange Online, and how long it tried to reach the remote server. The name of the email mail server in the destination domain, and the error message that's returned by the email server. If you suspect a problem with the destination domain, notify the recipient (by phone, in person, etc.) with the information in the NDR so they can notify their email admins: Temporary network or internet connection issues in the destination domain.Īggressive anti-spam settings in the destination domain that block legitimate senders (for example, all senders from any domain in Exchange Online). If you get this error only for messages that you sent to a specific domain (for example, only recipients in the domain), the problem is likely with that destination domain. If the steps in this section don't fix the problem for you, contact your email admin and refer them to this article so they can try to resolve the issue for you. This section contains the steps that you can try to fix the problem yourself.
#Fix mtasa cd 46 error how to
Use the information in the NDR to help you decide how to fix the problem.
Why did I get this bounce message?įor more information, see the Causes for error code 4.4.7 section later in this article. This article describes what you can do if you see error code 550 4.4.7 in a non-delivery report (also known as an NDR, bounce message, delivery status notification, or DSN). It's frustrating when you get an error after sending an email message. Mail flow rules are now available in the new Exchange admin center.
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