How to set up transport rule

You have to set up a transport rule to route the messages through the SpamBull spam filter.

1. Sign in to Exchange Admin Center with global administrator credentials.
2. In the left menu, expand the tab Mail Flow.
3. Click on Rules.

4. Click on + Add a rule.
5. Click on Create a new rule.

6. Fill the fields in as follows:

• Name: Route through SpamBull
• Apply this rule if: The Sender – domain is – specify your domain.
• Do the following: Redirect the message to – the following connector – select the SpamBull outbound filter.
• Except if: The recipient – is external/internal – Inside the organization.

7. Click Next.

8. Choose Enforce.
9. Click Next.

10. Verify the settings and click Finish.

11. Click Done.

12. Click in the Rules list on the Route through SpamBull rule.
13. Enable the rule.

The transport rule is successfully added and enabled.