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POST
/
emails
import { Resend } from 'resend';

const resend = new Resend('re_xxxxxxxxx');

const { data, error } = await resend.emails.send({
  from: 'Acme <onboarding@resend.dev>',
  to: ['delivered@resend.dev'],
  subject: 'hello world',
  html: '<p>it works!</p>',
  replyTo: 'onboarding@resend.dev',
});

{
  "id": "49a3999c-0ce1-4ea6-ab68-afcd6dc2e794"
}

​
Body Parameters

​
from
string
required
Sender email address.To include a friendly name, use the format "Your Name <sender@domain.com>".
​
to
string | string[]
required
Recipient email address. For multiple addresses, send as an array of strings. Max 50.
​
subject
string
required
Email subject.
​
bcc
string | string[]
Bcc recipient email address. For multiple addresses, send as an array of strings.
​
cc
string | string[]
Cc recipient email address. For multiple addresses, send as an array of strings.
​
html
string
The HTML version of the message.
​
text
string
The plain text version of the message.
If not provided, the HTML will be used to generate a plain text version. You can opt out of this behavior by setting value to an empty string.
​
react
React.ReactNode
The React component used to write the message. Only available in the Node.js SDK.
​
headers
object
Custom headers to add to the email.
​
attachments
array
Filename and content of attachments (max 40MB per email, after Base64 encoding of the attachments).See examples
​
tags
array
Custom data passed in key/value pairs.See examples.
​
template
object
To send using a template, provide a template object with:
  • id: the id or the alias of the published template
  • variables: an object with a key for each variable (if applicable)
If a template is provided, you cannot send html, text, or react in the payload, otherwise the API will return a validation error.When sending a template, the payload for from, subject, and reply_to take precedence over the template’s defaults for these fields. If the template does not provide a default value for these fields, you must provide them in the payload.
​
id
string
required
The id of the published email template. Required if template is provided. Only published templates can be used when sending emails.
​
variables
object
Template variables object with key/value pairs.
variables: {
	CTA: 'Sign up now',
	CTA_LINK: 'https://example.com/signup'
}
When sending the template, the HTML will be parsed. If all the variables used in the template were provided, the email will be sent. If not, the call will throw a validation error.See the errors reference for more details or learn more about templates.

​
Headers

​
Idempotency-Key
string
Add an idempotency key to prevent duplicated emails.
  • Should be unique per API request
  • Idempotency keys expire after 24 hours
  • Have a maximum length of 256 characters
Learn more
import { Resend } from 'resend';

const resend = new Resend('re_xxxxxxxxx');

const { data, error } = await resend.emails.send({
  from: 'Acme <onboarding@resend.dev>',
  to: ['delivered@resend.dev'],
  subject: 'hello world',
  html: '<p>it works!</p>',
  replyTo: 'onboarding@resend.dev',
});

{
  "id": "49a3999c-0ce1-4ea6-ab68-afcd6dc2e794"
}