Remove risky mail flow rules

A single transport rule can bypass spam filtering tenant-wide, redirect mail to attacker addresses, or strip Microsoft-added authentication headers. Far higher leverage than per-mailbox rules, and far less commonly reviewed.

A scan reports where your tenant stands on this check — pass, fail with a step-by-step fix, or not applicable if your licensing doesn’t include the feature. When Tenant Strike can’t read a setting with read-only access, it says unverified and gives you a one-command way to confirm it yourself — it never guesses.