when creating mail account, smtp authentication error error with error 550

Question

when creating mail account, smtp authentication error error with error 550

Answer 1

Hi! Are you trying to create a Microsoft account using an existing email address, such as Gmail, or a Microsoft email address, such as @outlook.com or @hotmail.com?

Check if you're in the right place: Go to https://account.microsoft.com/account > Click Sign in > Create an account.

If that doesn't work:

• Use a different browser
• Use a different internet connection
• Use a different computer or mobile phone

Answer 2

The SMTP authentication error with error code 550 typically indicates that there is a problem with the configuration of the email account or the application trying to send the email. Here are some steps you can take to resolve this issue:

1. Verify Credentials: Ensure that the username and password used for SMTP authentication are correct. This includes checking for any typos or incorrect case.
2. TLS Negotiation: Make sure that the application or device you are using is capable of negotiating TLS, as it is required for authentication with Microsoft 365 or Office 365.
3. Check Email Settings: If you are using a multifunction device or application, confirm that it is set up correctly to send emails using Microsoft 365 or Office 365. You can refer to the guide on setting up such devices for more details.
4. Account Permissions: Ensure that the account being used for sending emails has the necessary permissions to send emails. If the account is disabled or restricted, it may lead to authentication errors.

If you continue to experience issues, consider checking the SMTP server settings and ensuring that your network allows outbound connections to the SMTP server.

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References:

• Fix NDR error "550 5.7.57" in Exchange Online
• Fix issues with SMTP AUTH client submission