Outlook sender not authorized for relay. (Office 365) Status code: 550 5.7.367

If you are receiving an error message that says “Outlook sender not authorized for relay” with a status code of 550 5.7.367 and a category of “Outlook”, it means that your email message was not delivered because your email address is not authorized to send emails through the recipient’s email server. This error message is commonly encountered by Office 365 users who are trying to send emails to external recipients.

To fix this problem, you need to follow these steps:

1. Check your email settings: Make sure that your email settings are correct and that you are using the correct email address and password. You can do this by logging in to your Office 365 account and checking your email settings.

2. Check your email server settings: Make sure that your email server settings are correct and that you are using the correct server name and port number. You can do this by contacting your email service provider or IT department.

3. Check your email authentication settings: Make sure that your email authentication settings are correct and that you are using the correct authentication method. You can do this by checking your email account settings and making sure that the authentication method is set to “Password” or “OAuth”.

4. Check your email address: Make sure that your email address is correct and that it is not being blocked by the recipient’s email server. You can do this by contacting the recipient and asking them to whitelist your email address.

5. Contact your email service provider or IT department: If none of the above steps work, you should contact your email service provider or IT department for further assistance. They may be able to help you resolve the issue or provide you with additional information about the error message.

In conclusion, if you are receiving an error message that says “Outlook sender not authorized for relay” with a status code of 550 5.7.367 and a category of “Outlook”, it means that your email message was not delivered because your email address is not authorized to send emails through the recipient’s email server. To fix this problem, you need to check your email settings, email server settings, email authentication settings, email address, and contact your email service provider or IT department for further assistance.

Conclusion

I hope these steps were helpful in resolving the “Outlook sender not authorized for relay” error message. If you continue to experience issues, don’t hesitate to reach out to your email service provider or IT department for further assistance. Thank you for using our services.

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