This document describes the steps to configure an SMTP Relay Connector to could send email from systems and applications to recipients that are internal to the organization and to send email to recipients that are outside the organization.
Internal SMTP Relay Connector
- Open the Exchange Admin Center (EAC) by browsing to: https://<FQDN of server>/ECP
- Go to the Mail flow > Receive Connectors >
- Click on “+” to add a new connector.
Select Role (Hub Transport) and type (Custom) click on Next
- Leave the setting below unchanged.
- Remove the IP range which is shown in the picture below and add a single IP address or a local LAN address which is allowed to email via the exchange server.
- Finish the wizard and edit the relay connector and go to security tab.
Select the option “Anonymous users” and Save
- Use the Exchange Management PowerShell (with administrative rights) to run the command below:
Get-ReceiveConnector “Receive Connector Name” | Add-ADPermission -User “NT AUTHORITY\ANONYMOUS LOGON” -ExtendedRights “Ms-Exch-SMTP-Accept-Any-Recipient”
Now you should be able to send an email from applications located on the defined IP’s (step 5).
External SMTP Relay Connector
To could send email to recipients that are outside the organization, you have to create another receive connector. This is the sameway as configuring the Internal Relay Connector, but in step 3 from above you have to choose “Frontend Transport”.
And at step 4, you have to bind to a secondary IP address of your Exchange server.