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Description

Create a new ASR rule that matches on free email providers within the From address while being routed through sendgrid.net mail infrastructure. This has been observed in the wild with a large amount of callback phishing.

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@zoomequipd zoomequipd requested a review from a team as a code owner December 19, 2025 15:28
@github-actions github-actions bot added the in-test-rules PR is in our testing suite to collect telemetry label Dec 19, 2025
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in-test-rules PR is in our testing suite to collect telemetry

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