Disposable email inboxes
for your automation tests

Create isolated inboxes on demand, receive emails via SMTP, and fetch them instantly through a simple REST API. No more shared mailboxes or flaky email tests.

Start for free → View API Docs

test_signup.py

# 1. Create a disposable inbox
inbox = requests.post("https://getmailflat.com/api/inboxes",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={"prefix": "signup"}
).json()
# → { "address": "signup@x7k2m.getmailflat.com" }

# 2. Trigger the signup flow in your app
driver.find_element(By.ID, "email").send_keys(inbox["address"])

# 3. Fetch the OTP from the inbox
emails = requests.get(f"https://getmailflat.com/api/inboxes/{inbox['address']}/emails",
    headers={"Authorization": "Bearer YOUR_API_KEY"}
).json()
otp = re.search(r'\d{6}', emails[0]["body"]).group()

Features

Everything your tests need

No configuration, no shared state, no flaky tests.

📬

Instant Inboxes

Create isolated email inboxes on demand via API. Each inbox gets a unique address like signup@x7k2.getmailflat.com.

⚡

Real SMTP Reception

Emails are received over real SMTP on port 25 — no webhooks or polling delays. Your tests get emails the moment they arrive.

🔑

Simple REST API

Create inboxes, list emails, read body content — all with straightforward JSON endpoints. Works with any language or framework.

🗑️

Auto Cleanup

Inboxes and emails are automatically purged after their TTL expires. No manual cleanup required between test runs.

🔒

Isolated Per Test

Each test gets its own inbox. No more race conditions from shared mailboxes across parallel test runs.

🖥️

Built-in Dashboard

Inspect received emails in a clean three-panel UI. Debug your email flows without writing a single line of code.

How it works

Up and running in minutes

Create an account

Create an inbox

POST to /api/inboxes and get a unique email address instantly.

Run your test

Use the inbox address in your test flow. Emails arrive in real-time.

Fetch & assert

GET the emails via API, extract OTPs or links, and assert your expected behavior.

Disposable email inboxes for your automation tests

Ready to fix youremail tests?

Disposable email inboxes
for your automation tests

Ready to fix your
email tests?