One inbox per test
Create separate email addresses for test users and parallel runs. Match each message to the inbox your test created.
A Mailtrap alternative for the customer journey after send.
Receive real emails, test verification codes and reset links, and check how the message looks. MailSlurp combines inbox APIs with email and SMS QA.
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Follow the message all the way to the inbox.
Trigger a signup, password reset or order confirmation in your app. Receive the actual email in MailSlurp and inspect its subject, sender, body, headers and attachments. A successful API response is only the start of the journey.
Explore end-to-end email testing
Wait for the right message
Use wait APIs and message filters to retrieve the expected email within a defined timeout.
Finish the customer journey
Extract the verification code or reset link, return to your app and check the next screen.
Email and SMS. One complete test.
A customer can sign up by email and verify a phone number in the same session. Give your test an inbox and a phone number, receive both messages and check the code before continuing.
Use MailSlurp with Playwright, Cypress, Selenium or your existing test runner. Keep the received message available when a failed run needs investigation.
Explore SMS testing
Make sure the email works for the person opening it.
An automated assertion can confirm the link exists. Device previews show how the delivered email looks, and Email Audit checks for broken links, missing images and content issues before a release.
See real-client previews
How to run your first end-to-end check
Create a test identity
Create an inbox for the test user, then enter its address in your application's signup or password-reset form. Use a separate inbox for each parallel run.
Receive and inspect the message
Wait for the expected email. Check the recipient, subject and content, then extract the code or URL your customer needs. The email testing guide covers the workflow.
Complete the action and repeat
Submit the code or open the link in your test session. Assert the application outcome, retain useful failure evidence and add the check to your normal test suite. Start with our Playwright email testing guide.
Start with one journey your customers use every day.
Start with the received message
Trigger a signup or password reset and deliver it to a MailSlurp inbox. Assert the received content, extract the expected link and check the application outcome after opening it.
Verify the sending path and test recipient
When evaluating a Mailtrap alternative, review the sending credentials and recipient handling used by your test environment. Keep the initial migration small, then add SMS checks, device previews and placement tests to the workflows that need them.
Questions before you switch?
How do I check the delivery path as well as the email content?
Send from the application through the provider and settings you want to evaluate, using a controlled MailSlurp recipient. Inspect the message that arrives, its headers and attachments, then complete the customer link or code step. Use a separate placement test through the same sender when you also need provider inbox or spam results. Test placement through your sending provider.
Can I use my existing test runner?
Yes. Use MailSlurp APIs or SDKs to create inboxes, wait for messages and retrieve codes or links from Playwright, Cypress, Selenium or another test runner. Complete the action in your application and assert the final state.
Can I test SMS and the appearance of an email too?
Yes. Add phone numbers and SMS checks for verification flows, and use device previews to inspect the delivered email on supported clients. Current plans show the allowances for each capability.
Make the next release a checked one.
Create a test inbox and complete your first email journey.