Set outbound spam limits

Without sensible outbound rate limits, a compromised account can send tens of thousands of phishing emails (to internal users, to your customers) before Microsoft's tenant-level limits kick in. Tight per-user limits AND BlockUser action when the limit is hit contain the blast radius of any single account compromise.

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.