Migrate from Mailtrap

testing.messages.get() + waiting → messages.waitFor()

const client = new MailtrapClient({
  token: TOKEN, accountId: ACCOUNT_ID, testInboxId: INBOX_ID,
});

// The message has to have arrived first.
await new Promise((r) => setTimeout(r, 5_000));

const messages = await client.testing.messages.get(INBOX_ID);
const text = await client.testing.messages.getTextMessage(
  INBOX_ID, messages[0].id,
);

const code = text.match(/\b\d{6}\b/)?.[0];

import { Facteur } from '@facteur-eu/sdk';

const facteur = new Facteur({ apiKey: process.env.FACTEUR_API_KEY });

// Blocks until it arrives. No sleep, no retry.
const message = await facteur.messages.waitFor({
  inbox: INBOX_ID,
  sentTo: address,
  wait: 30_000,
});

const code = message.otp;

The Mailtrap code above follows their own published example; the sources are at the foot of this page. Ours runs as written.

1. 1

   Create an account and an inbox

   Every inbox gets its own subdomain, and any address ending in it is accepted from the first message. There is nothing else to provision.

2. 2

   Point your sends at the inbox

   Where Mailtrap captures your application’s SMTP traffic, your scenarios now write to a public address of the inbox: the message travels the real sending path, the one a user would see.

3. 3

   Replace the calls in the tests

   Listing the messages, and the sleep before it, become a single messages.waitFor() that blocks until arrival and hands back the body, the links and the code already extracted.

4. 4

   Run the suite, then cancel

   Keep both accounts until the suite is green: there is no data to export and no DNS to switch, so nothing forces the pace.

• Structure de l’offre Email Sandbox relevée sur mailtrap.io/pricing le 9 août 2026 : chaque plan fixe le nombre de sandboxes, d’utilisateurs et le volume d’emails de test, et le SSO n’apparaît qu’aux plans supérieurs.
• La même page ne publie aucune durée de rétention pour le Sandbox : nous n’affirmons donc rien à son sujet.
• Le code montré sur cette page suit leur exemple officiel `examples/testing/messages.ts` du paquet `mailtrap` sur npm, relevé le 12 août 2026 : `client.testing.messages.get(inboxId)` puis `getTextMessage(inboxId, messageId)`.

Other comparisons: Mailisk · MailSlurp · Mailpit · Mailosaur