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Manage Accepted Domains in EOP

Exchange 2013

Applies to: Exchange Online Protection

Topic Last Modified: 2014-04-14

Microsoft Exchange Online Protection (EOP) displays a list of domains that are protected by the service that you’ve provisioned in the Microsoft Office 365 admin center. You can view these domains or change the domain type by using the Exchange admin center (EAC), or you can add, edit, or remove these and other domains using the Office 365 admin center. For more information about how to manage domains in the Office 365 admin center, see Add your domain to Office 365.

In Microsoft Forefront Online Protection for Exchange (FOPE), virtual domains were used to route mail to a specific site. In EOP, you can route messages to a specific site using transport rules and connectors. For more information, see Scenario: Conditional Mail Routing.
  • Estimated time to complete: 5 minutes

  • You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the "Domains" entry in the Feature Permissions in EOP topic.

  • For information about keyboard shortcuts that may apply to the procedures in this topic, see Keyboard Shortcuts in the Exchange Admin Center.

Having problems? Ask for help in the Exchange forums. Visit the forums at: Exchange Server, Exchange Online, or Exchange Online Protection.
  1. In the EAC, go to Mail Flow > Accepted domains, and click the Name, Accepted domain, or Domain type column heading to sort alphabetically in ascending or descending order. By default, accepted domains are sorted alphabetically in ascending order by name.

  1. In the EAC, go to Mail Flow > Accepted domains.

  2. Select the domain and click Edit.

  3. In the Accepted Domain window, in the This accepted domain is section, select the domain type. The possible values are:

    • Authoritative - Email is delivered to valid recipients in your organization which may include local recipients as well as recipients whose messages are being routed to a shared environment. All email for unknown recipients is rejected. This setting can be used to enable Directory Based Edge Blocking (DBEB). For more information about DBEB, see Use Directory Based Edge Blocking to Reject Messages Sent to Invalid Recipients.

    • Internal Relay - Email is delivered to recipients in your organization or relayed to an email server at another physical or logical location. You can use this setting to enable email flow to subdomains of accepted domains. For more information, see Enable Email Flow for Subdomains in EOP.

  4. When you’re finished, click Save.

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