Mailgun Webhooks When to Use This Skill - Setting up Mailgun webhook handlers - Verifying Mailgun webhook signatures (HMAC-SHA256 over ) - Debugging Mailgun signature verification failures - Handling email delivery events: , , , - Handling list events: , - Distinguishing permanent vs temporary failures via the field - Verifying subaccount webhooks via the optional field How Mailgun Webhooks Differ Unlike most providers, Mailgun puts the signature inside the request body , not in a header. The webhook payload always has this shape: Verify by computing and comparing the hex digest to using timi…