If the Hardfail option is activated, no emails that are sent from an unregistered server will be delivered. Only emails coming from a registered server will be properly delivered.

Default Settings:

By default, hardfail is disabled so all incoming emails from all servers will be properly delivered.

Did this article help you?

Your feedback helps us to further improve our services. To leave feedback, log in to your IONOS account by clicking on the login button at the top right. You can then submit a rating below the article.