Send email from Express over SMTP

Send from an Express route with Nodemailer pointed at Unitpost. Keep the key in env, not in the repo.

1. 1

   Install Nodemailer

   Shell

   npm install nodemailer

2. 2

   Send from a route

   JavaScript

   import express from "express";
   import nodemailer from "nodemailer";
   
   const transporter = nodemailer.createTransport({
     host: "smtp.unitpost.com",
     port: 587,
     secure: false,
     requireTLS: true,
     auth: {
       user: "unitpost",
       pass: process.env.UNITPOST_API_KEY,
     },
   });
   
   const app = express();
   app.post("/send", async (_req, res) => {
     await transporter.sendMail({
       from: "you@yourdomain.com",
       to: "customer@example.com",
       subject: "Hello from Express",
       html: "<p>Sent via SMTP.</p>",
     });
     res.json({ ok: true });
   });

3. 3

   Verify delivery

   Confirm in Activity.