Stripe webhooks are a reliable source of billing events, but the webhook request should not become the email system. The safe pattern verifies the event, records it once, responds quickly, and lets a queue decide which message belongs to the current customer state.
Read the raw request body and verify the Stripe signature with the endpoint secret before parsing or acting on the event. Reject unverifiable requests. Keep live and test endpoint secrets separate so a test event cannot trigger production email.
Stripe retries webhook delivery, and two workers can receive the same event close together. Insert the Stripe event ID into a table with a unique constraint before creating an email job. If the insert conflicts, acknowledge the webhook and do not create a second send.
Use the Stripe event ID as part of the email idempotency key. A timeout after the provider accepts the message should not turn into a duplicate receipt.
Return a successful response after verification and durable event storage. Template rendering, provider calls, enrichment, and retry logic belong in a background job. This keeps the webhook inside Stripe time limits and makes email failures independently retryable.
An event describes what changed, not always what should be sent now. Before dispatch, read the latest subscription, invoice, account, and contact state. Suppress a trial-ending prompt when the account already upgraded, and do not send a failed-payment message after a later payment succeeded.
Store the Stripe event ID, internal email job ID, provider message ID, template version, recipient, and final delivery state in one trace. Support should be able to answer why a billing email was sent and whether it arrived without searching three dashboards.
The question here is which one a backend engineer would rather operate. That means SDK depth in the language already in use, whether a retry can safely be replayed, how much the event log tells you when a customer says the email never arrived, and whether the pricing curve stays sane as volume grows.
Applied to how to send emails from stripe webhooks (2026), that means weighing developer experience, SDK breadth, idempotency keys, and operating track record ahead of the rest, against password resets, receipts, and magic links shipped from application code.