Bounceback message: This server requires authentication before sending emails to a locally hosted domain.
Posted by Hasan B on 30 May 2019 02:29:54 PM

You may receive the below bounceback message while sending emails to a domain which has its MX records pointing to one of our shared Windows Hosting servers i.e it uses the email functionality offered by the Plesk installation on the Windows server.

The bounceback occurs due to the following reasons.

1. The sending and receiving domains are hosted on the same shared Windows Server
2. The sending domain uses an external email service (such as Gsuite) however the Mail functionality is not deactivated for that domain in Plesk which results in an authentication failure.

The mail service of the sending domain needs to be deactivated in Plesk. This can be done by following the steps below:

1.Log into Plesk and navigate to the domain under the ‘Websites and Domains’ tab
2. Click on Mail Settings.
3.Un-check the “Activate Mail Service” option and Click Apply

Please check the instructions below:

In case the issue/error persists, our knowledge base is available 24/7 to help you find answers. You can also contact support through your preferred channel.

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