Service users and on-premises users who use a foreign mail server can send mail to each other.
About this task
You must define the Internet domain of the foreign mail server in a Global Domain Document that is synchronized to the service and then verified as owned by your company. To prevent this Global domain document from affecting mail routing in the on-premises environment, the Global domain document must be in a different
Domino® directory than the primary directory of your mail hub servers.
When a service user addresses mail to an on-premises user in the foreign mail server domain, the service recognizes that it is an internal domain for your company and routes it to an on-premises mail hub server. The mail hub server must be configured to initiate routing to the final destination on the foreign mail server. Typically, a Foreign SMTP Domain document is used for this purpose.
It is important that you do not put the Global Domain document for the foreign mail server domain in the primary
Domino directory of a mail hub server. If you do, the hub server treats the domain as a local domain and does not honor the Foreign SMTP Domain document for mail routing.
Users from the foreign mail server domain can have Person documents in a
Domino directory that is synchronized with the service. Person documents help service users address mail to these users, but the Person documents are not required for mail routing. If you create Person documents for foreign mail server users, select
Other Internet Mail in the
Mail system field. This field value is required for the service to route messages addressed to these users to the on-premises mail hub servers.
When an on-premises foreign mail server user sends a message to a service user, the foreign mail server routes the message to an on-premises
Domino SMTP server. If the SMTP server is in the same domain as a primary mail hub server, the mail is routed to the service automatically. The routing is done using Connection documents that the Domain Configuration tool creates for you on the mail hub server. If the SMTP server is not in the same domain as a primary mail hub server, you create the Connection documents required to route the mail to the service. For more information, see "Preparing for Lotus Notes mail routing."
Parent topic: Planning mail routing in a hybrid environment
Related tasks
Preparing Global Domain documents for foreign mail servers
Preparing for Notes mail routing