Transport Rules guides
Exchange Online mail flow rules that act on every message passing through the tenant. See the glossary entry →
5 guides touch on transport rules.
- Exchange Online Protection transport pipeline
How email flows through EOP — connection filtering, content filtering, transport rules, and the deliverability checks.
- Exchange transport rule examples
Real-world transport rule patterns — external-sender warnings, encryption triggers, blocking, and compliance scenarios.
- Managing Outlook signatures at scale
How to manage email signatures in Outlook — cloud signatures, transport rules, and third-party tools.
- Office 365 Message Encryption
OME is Microsoft's email encryption service — what it does, how to enable it, and what it looks like for recipients.
- Outlook rules and automation
Client-side rules, server-side rules, and Power Automate — the three ways to automate email handling in Microsoft 365.