Poste.io

Docker mail server with management UI and groupware.

Visit Poste.io Start free with MailKite

How MailKite fits

Poste.io is self-host Docker mail. MailKite is managed — no server to run.

Receive email into Poste.io via MailKite

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

webhook.ts

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

// MailKite POSTs every inbound email at your domain as JSON.
// Point a route at this handler in the MailKite dashboard.
export default async function handler(req: Request) {
  const raw = await req.text();
  const sig = req.headers.get("x-mailkite-signature") ?? "";

  // Reject anything not signed by your webhook secret
  const ok = await verifyWebhook(sig, raw, process.env.MK_WEBHOOK_SECRET!);
  if (!ok) return new Response("bad signature", { status: 401 });

  const email = JSON.parse(raw);
  // Route into Poste.io: open a ticket, create a task, store a record
  await routeIntoName(email);   // email.from · email.subject · email.text

  return new Response(JSON.stringify({ ok: true }));
}

Read the inbound webhooks guide

Poste.io is a Docker mail server with a free Community edition and paid Pro/Enterprise licenses. It includes a web admin, SOGo groupware, antispam/antivirus, mail archive, per-domain admins, and built-in Let's Encrypt.