CONFIGURING
To protect SMTP servers from unauthorized relaying, Domino® provides inbound relay controls used to define the hosts to which and from which a server can relay messages. The Domino SMTP listener denies requests to relay messages to or from unauthorized hosts
About this task
To prevent misuse of your system, configure Domino to prevent open relaying, while allowing relays originating from and destined for known domains and hosts. By default, a new Domino SMTP server prevents external hosts from relaying mail to any destination. You can further customize Domino's anti-relay controls to specify when relays are and are not allowed.
The Router/SMTP -> Restrictions and Controls -> SMTP Inbound Controls tab of the Configuration Settings document provides two sets of controls for managing relay access:
Related concepts Restricting SMTP inbound routing
Related tasks Setting inbound relay controls Specifying enforcement of inbound relay controls Restricting inbound SMTP connections Restricting mail routing based on domain, organization, and organizational unit Restricting who can send Internet mail to your users Restricting users from receiving Internet mail Supporting inbound SMTP extensions