Overview of Accepting or Rejecting Connections Based on the Recipient’s Address
AsyncOS uses a Recipient Access Table (RAT) for each public listener to manage accept and reject actions for recipient addresses. Recipient addresses include these:
- Email addresses
- Groups of email addresses
The System Setup Wizard guides the administrator in configuring at least one public listener (with default values) on the appliance. Configuring a public listener during setup involves specifying default local domains or specific addresses to accept mail. These local domains or specific addresses are the first entries in the RAT for that public listener.
For each public listener, the default entry, “All Other Recipients”, rejects email from all recipients. The administrator defines all local domains for which the appliance accepts messages. Optionally, you can also define specific users for whom the appliance will accept or reject messages. AsyncOS allows you to define acceptable local domains and specific users using the Recipient Access Table (RAT).
You might need to
configure a listener to accept messages for multiple domains. For example, if
your organization uses the domain
currentcompanyname.com and it previously used
oldcompanyname.com , then you might accept messages for
oldcompanyname.com . In this case, include both local
domains in the RAT for your public listener.
(Note: the Domain Map feature can map messages from one domain to another. See the Domain Map feature section of the “Configuring Routing and Delivery Features” chapter.)