inbound connectors

Inbound connectors in Exchange Online control how external mail enters a tenant, including Direct Send scenarios. Recent Microsoft clarifications highlight protection options that help administrators manage tenant exposure, prevent spoofing, and block unwanted anonymous mail appearing to originate from their own domains. The default MX-style endpoint resolves to Microsoft's shared mail ingress infrastructure, and understanding inbound connector settings is key to securing mail routing and enforcing anti-spoofing measures. This tag covers configuration, security implications, and best practices for Exchange Online inbound connectors.