Inbucket

Disposable email testing service / SMTP server for QA.

Visit Inbucket Start free with MailKite

How MailKite fits

Inbucket is for QA. MailKite is for production send + receive.

Send email from Inbucket 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 Inbucket",
  html: "<p>Sent in milliseconds via MailKite.</p>",
});

Read the sending quickstart

Inbucket is an open-source (Go, MIT) SMTP server built for testing: it swallows mail, serves a web UI and REST API, supports tagged mailboxes and retention policies, and offers optional POP3.