Ethereal is a fake SMTP service, mostly aimed at Nodemailer users (but not limited to). It's a completely free anti-transactional email service where messages never get delivered.


MailDev is described as 'Simple way to test your project's generated emails during development with an easy to use web interface that runs on your machine built on top of Node.js' and is an app in the development category. There are more than 25 alternatives to MailDev for a variety of platforms, including Web-based, Windows, Linux, Mac and SaaS apps. The best MailDev alternative is MailDrop, which is both free and Open Source. Other great apps like MailDev are MailGrab, Mailpit, MailHog and Mailcatch.app.
Ethereal is a fake SMTP service, mostly aimed at Nodemailer users (but not limited to). It's a completely free anti-transactional email service where messages never get delivered.


Origami SMTP was created with the idea to have a fake email server for testing purposes that supported TLS. This is because the code the developer was working on at the time had several hard coded values enforcing TLS so most other solutions would not work.


testmail.app is an email testing platform for developers and QA teams. Create unlimited test email addresses on the fly using namespaces and tags, with no inbox setup required. Tags make it easy to isolate emails between users and parallel test runs.




LunaticSMTP is a dummy SMTP server with desktop GUI for testing email sending applications.



A self-hosted SMTP testing gateway designed to replicate production email behavior—including TLS, DNS, authentication, and spam scoring—so your email tests reflect real-world conditions.

DevMail is an email sandbox service for software developers. It allows developers to capture emails from various environments and inspect HTML, text, source code, raw headers, and attachments, and improve deliverability by analyzing email spam scores.


Disposable email inboxes via API for testing signup and authentication flows, with automatic extraction of one-time passwords and magic links.

Mailnest is an all in one email QA tool for development & testing teams in IT companies to test & improve email functionality.




Mailsnag lets you build resilient SMTP integrations while protecting you from spamming customers during testing on QA and Staging environments. It is like Chaos Monkey for SMTP integrations.



