How does Push determine if a mail rule is suspicious?

The Push platform will flag any mail rule created by an employee that forwards mail to an external domain as a potentially suspicious rule.

Suspicious mail rule admin triage screen - KB 10068
Push administrators can triage external mail rules from the admin console.

You can triage suspicious mail rules from the Push admin console by going to Use cases > Suspicious mail rules.

Because it can be time-consuming for an administrator to review every mail forwarding rule to ensure it’s legitimate, we recommend using the ChatOps topic Check suspicious mail rules to automatically message employees when a mail rule is discovered to make sure they recognize it.

This approach makes it fast and easy to scale the review of mail rules by enlisting your employees’ help.

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