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Error message when sending an email on Outlook

Marion-23 Posted messages 25 Status Member -  
Slachette Posted messages 26 Registration date   Status Member Last intervention   -

Hello, I have a big problem since last week. I can no longer send emails to anyone. I receive this error message within seconds:

"We couldn't deliver your message. When Office 365 tried to send the message, the external mail server returned the following error. This is likely due to a problem or policy setting on the recipient's mail system.

Check the error for more information about the problem. It may indicate what happened and how to resolve the issue. For example, if it indicates that the message was blocked due to a potential virus, try sending the message without attachments.

For mail administrators
This error was reported by a mail server outside of Office 365. If the sender is unable to resolve the problem by modifying their message, it is likely a problem that only the recipient's mail administrator can solve.

  1. Check the error for more information about the problem. The error may indicate the cause of the issue and provide clues on how to resolve it. For example, if it states that the message was rejected due to a Sender Policy Framework (SPF) issue, you need to work with your domain registrar to properly configure your SPF record.
  2. Check the error for more information about where the problem is occurring. For example, look for a domain name such as contoso.com. This indicates the organization behind the error. The recipient's mail server may be at fault, or the issue could stem from a third-party service used by your organization or the recipient's organization to process or filter mails.
  3. If you cannot resolve the issue, contact the mail administrator of the responsible party. This could be the recipient's mail administrator, the administrator of your active hosting service, etc. Provide them with the error code and the error message included in this delivery failure notification to help them resolve the problem.

Office 365 support cannot assist you with this type of externally reported error."
I have tried everything, I am at a loss. Do you have a solution? Thank you in advance


1 answer

  1.
    Slachette Posted messages 26 Registration date   Status Member Last intervention  
     

    Hello, I have a similar problem. My email account is from Darty (dbmail) and recently, all messages sent to Gmail accounts are being rejected. It seems that Gmail blocks certain domains for security reasons. That's an explanation, but I haven't (yet) found a solution. Sorry.

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