In this example, Acme users send messages in the acme.com domain (internal messages) over SMTP. Mail1, Mail2, and Mail3 are IBM® Lotus® Domino™ mail servers with "SMTP allowed within the local Internet domain" enabled for "MIME messages only" on the Router/SMTP-Basic tab of the Configuration Settings document that applies to the servers and have the SMTP listener task enabled on the Basics tab of their Server documents. This allows the servers to send mail to each other over SMTP and to receive mail over SMTP.

The servers must be in the same Notes named network, based on TCP/IP, to route mail unless each server has the field "Servers within the local Domino domain are reachable via SMTP over TCPIP" set to Always in the Configuration Settings document that applies to it.

If a user sends a MIME message to another user in the acme.com domain, her mail server determines which server the recipient's mail file is on, connects to that server over TCP/IP, and transfers the message using SMTP. If the message is in IBM® Lotus® Notes® format, the message is routed using Notes routing.

Configuring these servers requires:

• Enabling the SMTP listener task for Mail1, Mail2, and Mail3.
• Enabling "SMTP allowed within the local Internet domain" for "MIME messages only" for Mail1, Mail2, and Mail3.
• Either having all three servers in the same Notes named network or enabling "Servers within the local Domino domain are reachable via SMTP over TCPIP" for each server.
• Entering the server's Fully qualified Internet host name field on the Basics tab of the Server document. The local Router uses the value in this field to define the local Internet domain in the absence of a Global Domain document. Other Domino servers on the network check this field before attempting inbound SMTP connections to this server. If the field is blank or contains an invalid value, all inbound mail transfers take place over Notes routing.

Sample mail routing configurations

Glossary