This guide provides step by step instructions on how to setup your SMTP2GO server as a Connector/Smart Host on Exchange Server 2019.
Note: any additional configuration of this connector is outside the scope of this guide or SMTP2GO support – Microsoft can provide you with support for Exchange 2019
Open the ‘Exchange Administration Center‘ (EAC).
Login to the EAC as an administrator.
In the left hand column select ‘Mail Flow‘.
Go to the ‘Send Connectors‘ tab.
Click ‘New‘ to add a new send connector.
Enter the name as ‘SMTP2GO‘, this is just a reference for the connection.
Set the type to ‘Internet‘.
Select ‘Route mail through smart hosts‘.
Click ‘Add‘ to add new smart host.
Enter the SMTP hostname: mail.smtp2go.com
The smart host will now be listed.
Tick the option for ‘Basic Authentication‘:
Enter your SMTP username and password from your SMTP2GO dashboard: ‘Settings > SMTP Users‘.
Click ‘Add‘ to add a new address space that is allowed to use the SMTP2GO smart host.
Set the type to ‘SMTP‘.
Set FQDN to ‘*‘ meaning all domains.
Set cost to ‘1‘.
Click ‘Add‘ to add an allowed source server.
Click the appropriate server or servers from the list and click ‘Add‘ for each.
Click ‘Finish‘ to save the connector.
You may need to restart the Exchange SMTP / Transport services for the changes to take full effect.
Optional – update default port
By default, Exchange 2019 will attempt to connect to the SMTP2GO servers on port 25. If you wish to change this to one of the alternative ports you will need to take the following steps.
Ports available at SMTP2GO:
TLS or no encryption >> available on ports 25, 2525, 8025, 587 and 80.
SSL >> available on ports 465, 8465 and 443.
1. Open the ‘Exchange Management Shell‘.
2. Type the following command to get a list of all your send connectors:
3. To change the SMTP port for your connector, enter the following command replacing ‘SMP2GO’ with the appropriate connector name from the Step 4 above:
Set-SendConnector -Identity "SMTP2GO" -Port 2525
4. To confirm the change has been applied, enter the following command:
Get-SendConnector "AuthSMTP"|fl Port
5. You will need to restart the SMTP / transport services on your Exchange server to fully apply and enable the changes.
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