In an SMTP Virtual Service (with 25 as the Port), the ESP feature is available when the Enable ESP check box is selected, but there is a reduced set of options. To configure an SMTP ESP Service, follow the steps below:

  1. In the menu on the left, click Virtual Services and select View/Modify Services.
  2. Click the Add New button.

  3. Enter the Virtual IP Address for the Virtual Service in the Virtual Address text box.
    Note: This is the Virtual IP address of the Virtual Service. It must be unique and not in use by any other device on the network.
  4. Enter 25 in the Port text box.
  5. Enter a recognizable Service Name, for example SMTP ESP.
  6. Click the Add this Virtual Service button.
  7. Expand the ESP Options section.

  8. Select Enable ESP.
  9. Ensure the Connection Logging check box is selected.
  10. Specify the domains permitted by this virtual service in the Permitted Domains field. For example, if the Virtual Service should receive SMTP traffic from john@progress.com, then progress.com must be specified in this field.
  11. Click the Set Permitted Domains button.
  12. Add any Real Servers, as needed, in the Real Servers section.

To check the status of the Virtual Service, select Virtual Services > View/Modify Virtual Services.