Remote Domains in Exchange Online
Applies to: Exchange Online
Topic Last Modified: 2013-02-18
You can create remote domain entries to define the settings for message transfers between your Exchange Online organization and external domains. When you create a remote domain entry, you control the types of messages that are sent to that domain. You can also apply message format policies and acceptable character sets for messages that are sent from users in your organization to the remote domain.
If a remote domain configuration blocks a specific message type from being sent to recipients in that domain, the message is deleted. If you specify a particular message format for the remote domain, the message headers and content are modified.
|If you configure message settings per user, the per-user settings override the remote domain settings.|
A remote domain is defined by the remote domain entry. The remote domain entry defines the SMTP address space of the external domain, and the settings that are applied to messages sent to recipients in the external domain. By default, there's a single remote domain entry named Default. The domain address space is configured as an asterisk (*). This represents all remote domains. If you don't create additional remote domain entries, all messages that are sent to all recipients in all remote domains have the same settings applied to them. If you create a remote domain entry for a specific external domain, the settings in that remote domain entry override the settings of the default remote domain for those external recipients. For instructions on how to create remote domain entries, see Manage Remote Domains.
When you configure remote domains, you can prevent certain types of messages from being sent to that domain. These message types include out-of-office messages, auto-reply messages, non-delivery reports (NDRs), and meeting forward notifications.
You can specify the message format, content transfer encoding method, and character set for email messages sent to remote domains. You can use these settings to make sure that email sent from your Exchange Online organization is compatible with the receiving messaging system that's used in the remote domain. For example, if you know that the remote domain's messaging system is Exchange, you can specify to always use Exchange rich text format (RTF). For more information, see the following topics:
In Exchange Online, users can configure out-of-office notifications for internal and external recipients. Internal and external out-of-office notifications are supported in Microsoft Outlook 2007 or later, and in Outlook Web App. You can use remote domains to prevent or allow specific types of out-of-office notifications and other automatic replies to specific external domains. For more information, see the following topics: