---
description: Advanced patterns and examples for sending transactional emails with Email Service.
title: Email sending
image: https://developers.cloudflare.com/og-docs.png
---

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# Email sending

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/email-service/examples/email-sending/index.md)|[Agent setup](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/agent-setup/)

Advanced patterns and examples for sending emails with Cloudflare Email Service. Most examples use the [Workers binding](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/email-service/api/send-emails/workers-api/); the same [EmailMessageBuilder](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/email-service/api/send-emails/workers-api/#send-method) fields (`to`, `from`, `subject`, `html`, `text`, `cc`, `bcc`, `replyTo`, `attachments`, `headers`) apply to the [REST API](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/email-service/api/send-emails/rest-api/) as JSON in your HTTP request body. The [Send email over SMTP](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/email-service/examples/email-sending/smtp/) example covers sending over SMTP from several languages and clients.

* [Specify recipients](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/email-service/examples/email-sending/recipients/)
* [User signup flow](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/email-service/examples/email-sending/signup-flow/)
* [Magic link authentication](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/email-service/examples/email-sending/magic-link/)
* [Email attachments](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/email-service/examples/email-sending/email-attachments/)
* [Send email over SMTP](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/email-service/examples/email-sending/smtp/)
* [Sync recipient records](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/email-service/examples/email-sending/sync-recipient-records/)

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