issue with sending email in outlook giving following error code : cf24

I am having the same issue that just started on Tuesday, February 20, 2024.

I can login to my Gmail account and send emails without an issue.

Here are the error codes from the undeliverable messages.

Technical details

MessageDeliveryFailedException: Could not deliver the message [len=70, data=000000009A25727315463047823F9CCD733FC28507000552D3DCD214C14FA177361D98A4134D00000000010F00000552D3DCD214C14FA177361D98A4134D0000127AFC770000] sent at 2/19/2024 9:32:56 PM. Failure code: 21be

Technical details

SmtpSubmissionPermanentException: Smtp submission failed. Server 'smtp.gmail.com' Port '587'. --> Unexpected SMTP server response. Expected: 235, actual: 334, whole response: 334 eyJzdGF0dXMiOiI0MDAiLCJzY2hlbWVzIjoiQmVhcmVyIiwic2NvcGUiOiJodHRwczovL21haWwuZ29vZ2xlLmNvbS8ifQ==

Failure code: cf24

SmtpSubmissionPermanentException: Smtp submission failed. Server 'smtp.gmail.com' Port '587'. --> Unexpected SMTP server response. Expected: 235, actual: 334, whole response: 334 eyJzdGF0dXMiOiI0MDAiLCJzY2hlbWVzIjoiQmVhcmVyIiwic2NvcGUiOiJodHRwczovL21haWwuZ29vZ2xlLmNvbS8ifQ==   Failure code: cf24

Technical details SmtpSubmissionPermanentException: Smtp submission failed. Server 'smtp.gmail.com' Port '587'. --> Unexpected SMTP server response. Expected: 235, actual: 334, whole response: 334 eyJzdGF0dXMiOiI0MDAiLCJzY2hlbWVzIjoiQmVhcmVyIiwic2NvcGUiOiJodHRwczovL21haWwuZ29vZ2xlLmNvbS8ifQ==   Failure code: cf24

Hello Mohammed,

Thank you for your response.

Since you are using a family subscription, we will move this case to the dedicated team for better assistance. You will be notified on this thread.

Appreciate you patience on this.

Best Regards,

Ashraf.

I have exactly the same with Gmail on business outlook

Every email sent bounces back.

Thanks.

What is the type of account you are using?

• Familal subscription

Is this happening to all emails or to specific senders?

• All

Also, if you are using an IMAP account and you have recently changed my email password, please update your email account password via the Outlook Account screen. You can also try to remove and re-add the account again.

• already done

Hello Mohammed EL BERRAH,

Good day! Thank you for reaching out.

I'm sorry to hear that you're experiencing issues with sending emails in Outlook. Please let me know of the following to better assist. Thanks in advance.

1. What is the type of account you are using? Is it an MN3656 work/school account or a Microsoft/personal account like Gmail/Hotmail/outlook.com?
2. Is this happening to all emails or to specific senders?

In the meantime, please verify whether you can successfully send emails when you log into outlook on the web. This will; help narrow down if the issue is with the app or the account itself.

Also, if you are using an IMAP account and you have recently changed my email password, please update your email account password via the Outlook Account screen. You can also try to remove and re-add the account again.

Looking forward to your response.

Best Regards,

Ashraf.