Cloudflare Email Service

发送事务性邮件，并将传入邮件路由到 Workers 或电子邮件地址

Cloudflare Email Service 提供强大的电子邮件功能：

Email Sending（电子邮件发送） Beta 用于出站事务性邮件
Available on Workers Paid plan
Email Routing（电子邮件路由） 用于通过 Workers 处理传入邮件，或路由到电子邮件地址
Available on Free and Paid plans

这两项功能结合使用，可让你的应用程序收发电子邮件。例如，你可以将 Email Service 用于：

事务性邮件（欢迎消息、密码重置、订单确认）
身份验证流程（magic link、电子邮件验证、双因素身份验证）
通知和告警
自定义电子邮件地址（support@、contact@、orders@）
将电子邮件作为代理（agent）的交互方式，例如发送电子邮件以在工单跟踪系统中创建问题

可直接通过 Cloudflare Workers 的绑定（binding）、任何平台上的 REST API，或经过身份验证的 SMTP 访问 Email Service：

使用 EMAIL 绑定发送邮件，并在 src/index.ts 中使用 email() 处理程序处理传入邮件：

interface Env {
	EMAIL: SendEmail;
}

export default {
	// Handle HTTP requests (Email Sending)
	async fetch(request, env, ctx): Promise<Response> {
		// Send a welcome email
		await env.EMAIL.send({
			to: "user@example.com",
			from: "welcome@yourdomain.com",
			subject: "Welcome to our service!",
			html: "<h1>Welcome!</h1><p>Thanks for signing up.</p>",
			text: "Welcome! Thanks for signing up.",
		});

		return new Response("Email sent successfully");
	},

	// Handle incoming emails (Email Routing)
	async email(message, env, ctx): Promise<void> {
		// Forward to support team
		if (message.to.includes("support@yourdomain.com")) {
			await message.forward("team@yourdomain.com");
		}

		// Send auto-reply
		await env.EMAIL.send({
			to: message.from,
			from: "noreply@yourdomain.com",
			subject: "We received your message",
			html: "<h1>Thank you!</h1><p>We'll get back to you soon.</p>",
		});
	},
} satisfies ExportedHandler<Env>;

将绑定添加到你的 Wrangler 配置文件：

{
	"$schema": "node_modules/wrangler/config-schema.json",
	"name": "<ENTER_WORKER_NAME>",
	"main": "src/index.ts",
	"compatibility_date": "$today",

	// Email sending
	"send_email": [
		{
			"name": "EMAIL"
		}
	],

	// Email routing
	"email": [
		{
			"name": "EMAIL_HANDLER"
		}
	]
}

curl "https://api.cloudflare.com/client/v4/accounts/{account_id}/email/sending/send" \
  --header "Authorization: Bearer <API_TOKEN>" \
  --header "Content-Type: application/json" \
  --data '{
    "to": "user@example.com",
    "from": "welcome@yourdomain.com",
    "subject": "Welcome to our service!",
    "html": "<h1>Welcome!</h1><p>Thanks for signing up.</p>",
    "text": "Welcome! Thanks for signing up."
  }'

Cloudflare 还为 REST API 提供官方 SDK：Node、Python 和 Go。

cat > mail.txt <<EOF
From: welcome@yourdomain.com
To: user@example.com
Subject: Welcome to our service!

Thanks for signing up.
EOF

curl --ssl-reqd \
  --url "smtps://smtp.mx.cloudflare.net:465" \
  --user "api_token:<API_TOKEN>" \
  --mail-from "welcome@yourdomain.com" \
  --mail-rcpt "user@example.com" \
  --upload-file mail.txt