email API for Node.js

If you want an email API for Node.js, the best options depend on whether you want to send emails, receive emails, or both.

Common choices

1. SendGrid

Good for transactional emails, marketing, and good deliverability.

npm install @sendgrid/mail

import sgMail from '@sendgrid/mail';

sgMail.setApiKey(process.env.SENDGRID_API_KEY);

const msg = {
  to: 'user@example.com',
  from: 'you@yourdomain.com',
  subject: 'Hello from Node.js',
  text: 'This is a test email',
  html: '<strong>This is a test email</strong>',
};

await sgMail.send(msg);

---

2. Nodemailer

Best if you want to send via SMTP and keep it simple.

npm install nodemailer

import nodemailer from 'nodemailer';

const transporter = nodemailer.createTransport({
  host: 'smtp.example.com',
  port: 587,
  secure: false,
  auth: {
    user: process.env.SMTP_USER,
    pass: process.env.SMTP_PASS,
  },
});

await transporter.sendMail({
  from: '"Your App" <no-reply@yourdomain.com>',
  to: 'user@example.com',
  subject: 'Hello',
  text: 'Test email',
  html: '<b>Test email</b>',
});

---

3. Resend

Very simple API for modern apps.

npm install resend

import { Resend } from 'resend';

const resend = new Resend(process.env.RESEND_API_KEY);

await resend.emails.send({
  from: 'Your App <onboarding@yourdomain.com>',
  to: 'user@example.com',
  subject: 'Hello',
  html: '<p>This is a test email</p>',
});

---

Which one should you use?

• Need SMTP support? → nodemailer
• Need easiest modern email API? → resend
• Need scalable production email delivery? → sendgrid

If you want, I can give you:

1. a full Node.js email example
2. a Node.js Express email endpoint
3. a comparison table of email APIs