How to intercept Nodemailer emails with MailHog

In this article you will learn how to intercept Nodemailer emails with MailHog, a developer tool to visualize email messages.

#Setting up Nodemailer

Install Nodemailer:

npm install nodemailer

If you're using TypeScript:

npm install --save-dev @types/nodemailer

Setup:

import nodemailer from "nodemailer";

let mailer;
if (process.env.NODE_ENV === "development") {
  mailer = nodemailer.createTransport({
    port: 1025,
  });
} else {
  mailer = nodemailer.createTransport({
    SES: new AWS.SES(),
  });
}

Check out this article to learn how to use Nodemailer with AWS SES.

Sending an email:

await mailer.sendMail({
  from: "from@me.com",
  to: "to@you.com",
  subject: "Hello",
  text: "Hello, World!",
});

#Setting up MailHog

docker-compose.yml

version: "3"
services:
  mailhog:
    image: "mailhog/mailhog"
    container_name: "mailhog"
    ports:
      - 8025:8025
      - 1025:1025

Add the following to your development script:

docker compose down
docker compose up -d

Go to http://localhost:8025/ to check the MailHog interface.