Resend delivery with Worker-native ergonomics.

@workermailer/resend brings the Resend API into Cloudflare Workers with the same queue and envelope patterns as the SMTP package.

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Highlights

Aligned with SMTP patterns.

Fetch-based Resend delivery, Worker compatible.
Same envelope and queue helpers as @workermailer/smtp.
Sandbox bundle included for EmDash provider wiring.

terminal Install with Bun

bun add @workermailer/resend

resend.ts Quick start

import { ResendMailer } from '@workermailer/resend'

const mailer = await ResendMailer.connect({
  apiKey: env.RESEND_API_KEY,
  from: 'Worker Mailer <mail@acme.com>'
})

await mailer.send({
  from: 'Worker Mailer <mail@acme.com>',
  to: 'alice@acme.com',
  subject: 'Hello from Resend',
  text: 'Sent via Resend from a Cloudflare Worker.',
  html: '<h1>Hello from Resend</h1><p>Worker-native delivery.</p>'
})

Queues

Batch Resend deliveries with queues.

Use Cloudflare Queues to process sends out of band without changing your Resend payloads.

queue.ts Queue handler

import { createQueueHandler } from '@workermailer/resend/queue'

export default {
  async queue(batch) {
    const handleQueue = createQueueHandler()
    await handleQueue(batch)
  }
}

Need SMTP instead?

Use the SMTP library for direct socket delivery, lifecycle hooks, and DSN support.

View SMTP library Read Resend docs