Skip to main content
Cartegraph Campus

Relay Connection With Cartegraph

  1. Connect to the Exchange Admin Center>Mail Flow>Receive Connectors>Add.
  2. Give the connector a name. For example, Cartegraph receive connector.
  3. Select Frontend Transport>Custom>Next.
  4. Either accept the default of TCP Port 25 (SMTP)>Next.


    The port selected must be accessible from the Internet.
    If security is a concern, you can change the default port to another unused TCP Port.
  5. Remove the range. This must be done so that you do not become an open relay for anyone.
  6. Add in the IP address of the host from which you want to allow relaying, Cartegraph hostedenvironment ip address,>Save.
  7. Open the properties of the connector you just created>Security>Under Authentication.
  8. Select Externally Secured (for example with IPSEC).
  9. Under Permission groups, select Exchangeservers and Anonymous users>Save.
  10. If you test and get the following error “421 4.4.1 Connection timed out” change some of the parameters of the receive connector.
  11. Execute the following PowerShell command:

Get-ReceiveConnector –Identity “Name of connector from Step 2” “ Set-ReceiveConnector –TarpInterval 00:00:00 –ConnectionTimeout
00:30:00 –ConnectionInactivityTimeout 00:20:00 –MaxAcknowledgementDelay 00:00:00 –MaxInboundConnection 10000
–MaxInboundConnectionPercentagePerSource 100 –MaxInboundConnectionPerSource unlimited

  1. Restart the Microsoft Exchange Transport Service on the Exchange server from PowerShell, Restart-Service MSExchangeTransport.
  2. Test the relay.