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Prerequisites

You will need an API key and a verified domain to get the most out of this guide:

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SMTP credentials

To set up your SMTP integration, you’ll need to provide the following credentials:
  • Host: smtp.usesend.com
  • Port: 465, 587, 2465, or 2587
  • Username: usesend
  • Password: YOUR-API-KEY

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Example with Nodemailer

Following example with Nodemailer shows how you can send mails with SMTP support from useSend and Nodemailer. 
const nodemailer = require("nodemailer");

const transporter = nodemailer.createTransport({
  host: "smtp.usesend.com",
  port: 465,
  secure: false,
  auth: {
    user: "usesend",
    pass: "us_123",
  },
  tls: {
    rejectUnauthorized: false,
  },
});

const mailOptions = {
  to: "[email protected]",
  from: "[email protected]",
  subject: "Testing SMTP",
  html: "<strong>THIS IS USING SMTP,</strong><p>useSend is the best open source sending platform<p><p>check out <a href='https://usesend.com'>usesend.com</a>",
  text: "hello,\n\nuseSend is the best open source sending platform",
};

transporter.sendMail(mailOptions, (error, info) => {
  if (error) {
    console.error("Error sending email:", error);
  } else {
    console.log("Email sent successfully:", info.response);
  }
});