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1. • • If an email message that you send can't be delivered to the intended recipient, Microsoft 365 or Office 365 typically generates an error code and sends a delivery status notification (DSN) to you. This notice is also known as a "bounce message" or "bounce-back message."
     learn.microsoft.com/en-us/exchange/troubleshoot/email-delivery/ndr/non-delivery-reports-in-exchange-online

     Email non-delivery reports and SMTP errors in Exchange Online

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     Find and fix email delivery issues as a Microsoft 365 for business admin

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3. learn.microsoft.com › en-us › exchangeFind and fix email delivery issues as a Microsoft 365 for ...

   learn.microsoft.com › en-us › exchange

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   Mar 14, 2024 · Under Email troubleshooting, select Troubleshoot message delivery. Run a message trace and view delivery details of messages that were sent in the past week. By default, message trace is set to search for all messages that were sent or received by your organization in the past 48 hours.

4. learn.microsoft.com › en-us › exchangeEmail non-delivery reports and SMTP errors in Exchange Online

   learn.microsoft.com › en-us › exchange

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   Oct 15, 2024 · If an email message that you send can't be delivered to the intended recipient, Microsoft 365 or Office 365 typically generates an error code and sends a delivery status notification (DSN) to you. This notice is also known as a "bounce message" or "bounce-back message."

5. answers.microsoft.com › en-us › outlook_comHow to resolve "Your message wasn't delivered because the ...

   answers.microsoft.com › en-us › outlook_com

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   Nov 26, 2021 · Kindly contact your local domain provider and ask them to update correct TXT records (as visible in O365 side) from their local DNS site. Once they update correct record from there end, it will sync up with Office 365. (Note: sync time totally depends on local domain provider server).

6. answers.microsoft.com › en-us › msofficeHow to solve "This message couldn't be delivered because the ...

   answers.microsoft.com › en-us › msoffice

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   Dec 12, 2022 · The most common reason for this error is that the email address is, or was, suspected of sending spam. Contact the organization's email admin for help and give them this error message." Please need your support. Thanks.

7. support.microsoft.com › en-us › officeOutlook replies or forwards cause non-delivery error “Your ...

   support.microsoft.com › en-us › office

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   Mar 25, 2024 · When you reply or forward an email you get a non-delivery report (NDR) like the one below. In this specific case the failure enum (7) in the NDR signifies that the recipient’s email autocomplete entry is bad. This is caused by a bug in Outlook Desktop that has since been fixed. Error:

8. learn.microsoft.com › en-us › exchangeFix NDR error 550 5.7.1 in Exchange Online - Exchange ...

   learn.microsoft.com › en-us › exchange

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   Jan 24, 2024 · Your message couldn't be delivered to the recipient because you don't have permission to send to it. Ask the recipient's email admin to add you to the accept list for the recipient. For more information, see DSN 5.7.129 Errors in Exchange Online and Microsoft 365 or Office 365.

9. People also ask

   Why was my email not delivered?

   • How to solve this message "This message couldn't be delivered because the sending email address was not recognized as a valid sender. The most common reason for this error is that the email address is, or was, suspected of sending spam. Contact the organization's email admin for help and give them this error message." Please need your support.

   How to solve "This message couldn't be delivered because the sending

   answers.microsoft.com/en-us/msoffice/forum/all/how-to-solve-this-message-couldnt-be-delivered/7c6a27c2-cc9a-45cb-9934-92938b2a2fd2

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   How do I troubleshoot email delivery in Microsoft 365?

   • Select Diag: Troubleshoot Email Delivery to launch the diagnostic in the Microsoft 365 admin center. Enter the email address of the sender and recipient in addition to other relevant information, and then select Run Tests. Sometimes, an email message gets lost in transit, or it can take a lot longer than expected for delivery.

   Find and fix email delivery issues as a Microsoft 365 for business

   learn.microsoft.com/en-us/exchange/troubleshoot/email-delivery/email-delivery-issues

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   Why can't I send a message to a recipient?

   • Your message couldn't be delivered to the recipient because you don't have permission to send to it. Ask the recipient's email admin to add you to the accept list for the recipient. For more information, see DSN 5.7.129 Errors in Exchange Online and Microsoft 365 or Office 365.

   Fix NDR error 550 5.7.1 in Exchange Online - Exchange

   learn.microsoft.com/en-us/exchange/troubleshoot/email-delivery/ndr/fix-error-code-550-5-7-1-in-exchange-online

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   What causes a message to send a wrong email address?

   • This error typically occurs if the sender of the message enters an incorrect email address of the recipient. The sender should check the recipient's email address and send again. This error can also occur if the recipient email address was correct in the past but has changed or been removed from the destination email system.

   Email non-delivery reports and SMTP errors in Exchange Online

   learn.microsoft.com/en-us/exchange/troubleshoot/email-delivery/ndr/non-delivery-reports-in-exchange-online

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   Why am I getting an email error message?

   • The most common reason for this error is that the email address is, or was, suspected of sending spam. Contact the organization's email admin for help and give them this error message." Please need your support. Thanks Hello I am Prakash and I will be glad to assist you today with your question.

   How to solve "This message couldn't be delivered because the sending

   answers.microsoft.com/en-us/msoffice/forum/all/how-to-solve-this-message-couldnt-be-delivered/7c6a27c2-cc9a-45cb-9934-92938b2a2fd2

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   Why is my email not sending a message?

   • Resending the original message will cause the same failure. For more information, see Fix email delivery issues for error code 5.1.1 through 5.1.20 in Exchange Online. The account was blocked for sending too much spam. Typically, this problem occurs because the account was compromised (hacked) by phishing or malware.

   Email non-delivery reports and SMTP errors in Exchange Online

   learn.microsoft.com/en-us/exchange/troubleshoot/email-delivery/ndr/non-delivery-reports-in-exchange-online

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10. answers.microsoft.com › en-us › outlook_comUnable to send email - receiving following could not be ...

    answers.microsoft.com › en-us › outlook_com

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    Apr 27, 2016 · clear the recipient auto-complete list in outlook or outlook on the web by following the steps in this article: fix email delivery issues for error code 5.1.10 in office 365, and then send the message again. retype the entire recipient address before selecting send.