4 guides
Create mail flow rules (transport rules) in Exchange Online: add disclaimers, route mail, block attachments, and warn on external senders, with EAC and PowerShell steps.
Pillar Guide
Build layered phishing defense in Microsoft 365: anti-phishing policies, impersonation protection, Safe Links and Attachments, MFA, DMARC/SPF/DKIM, and user reporting.
Safe Links and Safe Attachments both protect Microsoft 365 email, but they work differently. Here's what each does, when it triggers, and how to set up the policies.
Stop Microsoft 365 users from auto-forwarding email outside your company. Use the outbound spam policy, anti-phishing, and mail flow rules to block external forwarding.