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Configuring smart host for Microsoft Exchange and IBM Domino in Hosted Email Security (HES)

    • Updated:
    • 13 Mar 2020
    • Product/Version:
    • Hosted Email Security 3.0
    • Platform:
    • Not Applicable N/A

This article shows you how to configure smart host to relay to our HES servers. You can do this once the outbound email scan of the domain has an "Activated" status.


Select the server you are using to get specific instructions for that server.

  1. Open Exchange System Manager and click on the plus sign (+) next to Connectors to see if you are already using an SMTP Connector.

    Small Business Server (SBS) 2003 comes with a pre-configured SMTP Connector as shown below:

    SMB SMTP connector

  2. If you need to create a new connector, right-click Connectors and select New > SMTP Connector. If a SMTP Connector already exists, right-click the SMTP connector and select Properties.

    The SMTP Connector - Properties page opens.

  3. Name the Connector. Example: "TrendMicro Relay Connector".
  4. Select Forward all mail through this connector to the following smart hosts:
    • EMEA:
    • Non-EMEA:

    All Outgoing Mails

  5. Enter the HES Relay server address and click Add.
  6. Choose your Exchange Server and then click Add.
  7. Go to the Address Space tab and click Add.
  8. Select the following default options:
    • Type = SMTP


    • Email domain = *
    • Cost = 1

      Cost settings

    • Connector scope = Entire organization

      Connector scope

  9. Click OK and close the Exchange System Manager.
  10. Restart the following services for the settings to take effect:
    • Microsoft Exchange Routing Engine
    • Simple Mail Transport Protocol (SMTP)
  11. Restart the server.
  1. Open the Exchange Management Console.
  2. Click on the plus sign (+) next to Organization Configuration.
  3. Select Hub Transport and click the Send Connectors tab.
  4. Right-click the existing Send Connector then select Properties and go to the Network tab.
  5. Select Route mail through the following smart hosts and click Add.

    route mail

  6. Select Fully Qualified Domain Name (FQDN) and specify the HES relay servers:
    • EMEA:
    • Non-EMEA:
  7. Click OK.
  8. Go to the Address Space tab and click Add.
  9. Add an asterisk (*) and then click OK.

    Add domain

  10. Click Apply > OK.
  11. Go to the Source Server tab and add your Exchange Server.

    source server

  12. Click Apply > OK.
  1. Open the Exchange Admin Center and navigate to Mail Flow > send connectors.

    send connectors

    Click image to enlarge

  2. Click the plus (+) icon  to create a new Send Connector.

    create new send connector

    Click image to enlarge

  3. Give the connector a name and set the type to "Internet". Click Next to continue.
  4. Under Network Settings, select Route mail through smart hosts.
  5. Click the plus (+) icon to add the smart host address. Use the following FQDN as the smart host:

    • EMEA:
    • Non-EMEA:

      add smart host address

      Click image to enlarge

  6. Under the Smart host authentication section, select None.
  7. Save the configuration.
Make sure you already have a Configuration Settings document for the server(s) to be configured.
  1. From Domino Administrator, click the Configuration tab and then expand the Messaging section.
  2. Choose Configurations.
  3. Select the Configuration Settings document and then click Edit Configuration.
  4. Click the Router/SMTP > Basics tab.
  5. For the field Relay host for messages leaving the local Internet domain, enter one of the following addresses based on your location:

    • EMEA:
    • Non-EMEA:

      Configuration Settings

      Click image to enlarge

  6. Click Save then Close.
  7. Reload the routing configuration to put the new setting into effect immediately. Otherwise, the change will take effect after the next Router configuration update.
Configure; Update
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