Create a send connector in Exchange on premise

The third step is to create a send connector in Microsoft Exchange on-premise. The custom relay uses a send connector to submit sent messages to the Zivver SMTP Server.

With Microsoft Exchange, only one send connector can process an outbound message. Thus, make sure that you know in advance which send connectors are configured in Microsoft Exchange On-premise. It might not be possible to implement a custom relay. This is the case if it is necessary that a different specific send connector also processes the sent Zivver messages. For this limitation, you can send your use case to


  1. Go to the Exchange Administrative Center (EAC).
  2. Log into EAC as an administrator.
  3. Go to Mail Flow in the menu on the left.
  4. Go to Send connectors.
  5. Add a new connector.
  6. Enter a name. For example: Zivver Relay.
  7. Select for Type either Custom or Partner.
  8. Click Next.
  9. Select the option Route mail through these smart hosts.
  10. Click Add.
  11. Enter
  12. Click Save.
    The added smart host is now shown in the list.
  13. Click Next.
  14. Select for Smart host authentication the option Basic authentication.
  15. Enable the option Offer basic authentication only after starting TLS.
  16. Generate Mail Submission SMTP credentials in the Zivver Organization Settings.
  17. Enter for User name the generated SMTP username.
  18. Enter for Password the generated SMTP password.
  19. Click Next.
  20. Click Add.
  21. Enter for Type SMTP.
  22. Enter for FQDN the fictional domain. Use as the fictional domain.
  23. Enter for Cost a 1.
  24. Click Save.
  25. Enable the option Scoped send connector.
  26. Click Next.
  27. Click Add.
  28. Select a server.
  29. Click OK.
  30. Click Finish.

The Send Connector is set up to process all the messages that are sent to this placeholder domain.

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