Configure Exchange 2013/2016 to use a Smarthost
You should
provide the hostname of the CSEG server that you are using as your
preferred CSEG service
domain.
Routing all mails to a smarthost :
A 'send connector' must already have been created and configured correctly on the hub transport server.
- Open 'Exchange Admin Center' (EAC).
- Select 'Mail flow' on the left then click 'Send Connectors'.
- Select the existing send connector to view its properties.
- Click 'Delivery'.
- Select "Route mail through the following smart hosts:" under 'Specify how to send mail with this connector' and click the '+' button to add the smart host name.
- Enter mxpool1.spamgateway.comodo.com (for EU based CSEG server) or mxpool1.us.spamgateway.comodo.com (for US based CSEG server) in the 'add smart host' dialog.
If you have more then one smarthost, repeat the previous three steps.
- If you need to route all mails to the smart host with Username-Password or IP based Authentication, continue with the following settings:
- For Basic Authentication
- Select 'Basic Authentication' under Smart host authentication
- Tick the ‘Offer basic authentication only after starting TLS’ box
- Add your username and password that was previously created in CSEG Outgoing Users configuration page
- Click 'Save'
- For IP based Authentication
- Select 'None'
- Click 'Save'
- Then add outbound IP of your Exchange Server in CSEG Outgoing Users configuration page
- Under 'Source Server', click '+' in the 'Select a server' window.
- Select a mailbox server that will be used to send email to the internet via the 'Client Access' server
- Click 'Finish'.
The changes you've made will take effect straight away without requiring a reboot or restarting any services.