Mailpit

Modern MailHog replacement — fast Go SMTP catcher.

How MailKite fits

Mailpit is for dev/QA. MailKite is for production send + receive.

Send email from Mailpit with MailKite

A minimal, copy-paste starter. Swap in your own domain and API key.

send.ts

import { MailKiteClient } from "@mailkite/client";

// One API, your own DKIM-signed domain — no mail server to run
const mailkite = new MailKiteClient({ token: process.env.MK_API_KEY! });

await mailkite.send({
  from: "you@yourdomain.com",        // any address on a verified domain
  to: "user@example.com",
  subject: "Hello from Mailpit",
  html: "<p>Sent in milliseconds via MailKite.</p>",
});

Read the sending quickstart

Mailpit is a fast, modern SMTP catcher and testing tool (Go, MIT) that has largely replaced the stale MailHog (last released 2020). It captures mail, serves a web UI, supports IMAP, and runs as a single binary.