Creating a mail flow rule
While users can create their own rules to apply to messages upon delivery, mail flow rules set by administrators take effect on messages in transit before they're delivered. In this recipe, we'll create a mail flow rule to help identify and report outgoing mail containing credit card numbers.
Mail flow rules are also known as transport rules.
You should be a global admin or have the Organization Management role as part of your assigned permissions to be able to complete the steps in this recipe.
How to do it…
- Go to the classic Exchange admin center at https://outlook.office.com/ecp/.
- Select mail flow from the left-hand side navigation menu.
- Choose the plus sign (+) to create a new rule:
- In this recipe, we'll select Generate an incident report when sensitive information is detected: