Mailinator
Disposable email service. Create temporary inboxes for testing and privacy.
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Run the open-source version on your own infrastructure.
What is Mailinator?
Mailinator is an open-source web tool designed for email and SMS workflow testing, enabling developers and QA teams to validate critical processes like 2FA verification, sign-ups, and password resets without risking real user data. By providing temporary email inboxes at a private domain, it allows automated testing of email delivery systems while isolating test environments from production audiences. The tool addresses the challenge of ensuring email and SMS functionality works reliably across applications, offering scalable solutions for both manual and automated testing. Its API and webhook integrations support testing within frameworks like Selenium, Cypress, and Puppeteer, making it a versatile choice for teams needing rapid validation of communication workflows. Mailinator’s emphasis on privacy and scalability positions it as a critical utility for developers seeking to debug email-related issues without exposing user data.
How it works
Mailinator serves as a private message routing system for testing email and SMS workflows. It allows users to generate temporary email addresses at a dedicated domain, enabling secure testing of features like password resets and two-factor authentication without exposing real user data. The tool is designed to integrate with development and QA processes, offering a sandbox environment where email delivery systems can be validated at scale. Its open-source nature and API support make it accessible for both small projects and enterprise workflows. Mailinator provides nearly unlimited temporary email inboxes, allowing testers to simulate real-world scenarios without risking actual user data. It supports automated testing via APIs and webhooks, enabling integration with tools like Selenium and Cypress for end-to-end validation.
How to use it
- 1Create a free account on Mailinator’s website to access temporary email domains. 2. Generate a unique inbox address (e.g., user123@mailinator.com) for testing. 3. Configure your application to send emails or SMS to the generated inbox. 4. Use the platform’s interface or API to monitor and verify message delivery. Practical tips include leveraging webhooks for real-time notifications and using the API for programmatic inbox management. Automation frameworks can be configured to wait for specific emails in test inboxes before proceeding with subsequent test steps.
What it can do
- AI Tools
Use cases
Assumptions and limitations
Assumptions
- source: https://github.com/mailinator
- license: Open source
- privacy: Opens an external demo
Limitations
- Limited advanced filtering options for complex email content analysis
- No built-in support for mobile app-specific SMS testing beyond standard APIs
- Basic UI for inbox management may lack features of enterprise email clients
- No direct integration with all testing frameworks without custom API setup
- Temporary inboxes may expire if not accessed within specified timeframes
Understanding the result
Disposable email service. Create temporary inboxes for testing and privacy.
Tool details
- Clearly flagged when a network request is needed.
- No account, no sign-up, and no tracking of your content.
- Powered by mailinator (MIT).
- Built with
- mailinator (https://github.com/mailinator)
- License
- MIT
- Runs locally
- No — requires a network request
- Verification
- Not yet verified
- Input
- Text
- Output
- Output
Built with https://github.com/mailinator. OpenToolVault provides the discovery and browser interface while crediting the original project maintainers.
- Built with
- mailinator
- License
- MIT
Open-source project
OpenToolVault is an independent directory. We are not affiliated with or endorsed by this project.
References
- /mailinator — GitHub Repository
Upstream project · GitHub
Frequently asked
How does Mailinator handle email and SMS testing workflows?
Mailinator provides temporary email inboxes at a private domain, allowing applications to send emails or SMS to these addresses. Testers can monitor inbox contents via the web interface or API, verifying delivery success and content accuracy. SMS testing is supported through integration with standard messaging APIs, enabling validation of text message workflows without real user involvement.
How does Mailinator’s API integrate with testing frameworks?
Mailinator’s API allows programmatic access to inbox data, enabling automation tools like Selenium, Cypress, or Puppeteer to check for specific emails or SMS messages. Developers can configure their test scripts to wait for expected messages in designated inboxes, triggering subsequent test steps once verification is complete. Webhooks further enhance this by providing real-time notifications when new messages arrive.
How do I test a password reset workflow with Mailinator?
First, generate a temporary email address via Mailinator. Configure your application to send a password reset link to this address. Use the platform’s inbox interface to check if the email arrives, then simulate user interaction by clicking the link. Verify that the reset process completes successfully, ensuring no real user data is exposed during testing.
How does Mailinator compare to alternatives like Mailtrap or SendGrid?
Unlike Mailtrap, which focuses on email testing for web applications, Mailinator supports both email and SMS testing. SendGrid is a production email service, whereas Mailinator is strictly for testing. Mailinator’s open-source model and API-first design differentiate it from proprietary tools, offering greater flexibility for developers needing custom integration.
What should I do if my temporary inbox disappears?
If an inbox is no longer accessible, it may have expired after a set period of inactivity. To resolve this, regenerate a new inbox address through the Mailinator interface. Ensure your tests include logic to handle inbox expiration, such as automatically refreshing inboxes before critical test steps.