How Email API Domain Verification, Webhooks, and Logs Actually Work

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Email APIs rely on three core components — verified sending domains, webhooks, and logs — to handle outbound mail without running your own mail server. Domain verification requires adding SPF, DKIM, and DMARC DNS records, which authenticate your emails to receiving providers and prevent spoofing. Webhooks allow providers to push real-time event notifications to a registered HTTPS endpoint, eliminating the need to poll for delivery status. In the Notify API specifically, webhook payloads are not cryptographically signed, meaning developers must treat the endpoint URL itself as a secret and cross-check sensitive data against the logs API. Plan tier determines access limits across all three features, with free accounts restricted to one verified domain and no webhook endpoints.

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