To be able to connect with the Zivver SMTP Gateway, a Connector is used to submit the 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 enterprise@zivver.com.

Do these steps to create a Connector in Microsoft Exchange Online:

1. Go to the Exchange AdminCenter.
2. Click on Mail flow in the menu on the left.
3. Click on Connectors.
4. Click on add Add a connector.
5. For Connect from select the option Office 365.
6. For Connect to select the option Partner organization.
7. Click Next.
8. Enter a name for the connector. For example: Zivver.
9. Click Next.
10. Select the option Only when I have a transport rule set up that redirects messages to this connector.
11. Click Next.
12. Select the option Route email through these smart hosts.
13. Enter: smtp.zivver.com.
14. Click the plus (+) sign.
15. Click Next.
16. Make sure that the option Always use Transport Layer Security (TLS) to secure the connection (recommended) is enabled.
17. Make sure that the option Issued by a trusted certificate authority (CA) is enabled.
18. Click Next.
19. Enter an email address to validate the connector.
20. Click the plus (+) sign.

21. Click Validate.
    

    It can happen that the validation fails. This is because the validation message is not send from your own domain, but from a special domain that is not added to the Zivver SPF allowlist. You can ignore the warning and continue with the next step.

22. Once the validation finished click Next.
    If the validation failed because of the above, a confirmation window will open.
    Click Yes, proceed.

23. Click Create connector.

24. Click Done.

The connector is created and ready to use.