Enabling Office 365 as a relay host

In this step, you allow Microsoft 365 to be used as a relay host in the NoSpamProxy® configuration so that emails can be sent from Microsoft 365 to external communication partners through NoSpamProxy.

Without this configuration, NoSpamProxy will evaluate and reject emails as relay abuse attempts.

NOTE: Make sure that you have set up at least one corporate domain before you start the configuration.

  1. In the NoSpamProxy Command Center, go to Configuration > Email Routing and click Add.
    Corporate email servers
  2. Select the As Office 365 tenant type, and then click Next.
    Managing the corporate email servers
  3. Under Endpoint, make the appropriate selection for your organisational environment.
  4. Enter your tenant ID. Make sure that you enter the name of the ID (not the ID in hexadecimal notation).
  5. Click Next.
    Access point and client ID
  6. At Assigned company domains, select the domains that you have stored in Microsoft 365 and that will appear in the sender address for outbound emails.

    NOTE: If you do not find all domains here, you must add the missing domains under Identities > Corporate Domains > Corporate Domains. This is also possible at a later date.

  7. Click Next.
  8. Enter a comment if necessary and then click Finish.

The email server has been created.

Next steps

Now continue with the following steps:

Setting up forwarding to Microsoft 365

Configuring Microsoft 365

Creating the transport rule

Using NoSpamProxy in Microsoft 365 with Exchange Online

Necessary configurations for the operation in Microsoft Azure