Cost / License
- Free
- Open Source
Platforms
- Mac
- Windows
- Linux

Mailpit is the most popular Windows, Mac & Linux alternative to Origami SMTP.
Mailpit is the most popular Open Source & free alternative to Origami SMTP.
- Mailpit is Free and Open Source
Origami SMTP is described as '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' and is a Mail Server in the development category. There are more than 10 alternatives to Origami SMTP for a variety of platforms, including Web-based, Mac, Windows, Linux and SaaS apps. The best Origami SMTP alternative is Mailpit, which is both free and Open Source. Other great apps like Origami SMTP are MailHog, MailMug.net, Mailtrap and Papercut.

Mailpit is the most popular Windows, Mac & Linux alternative to Origami SMTP.
Mailpit is the most popular Open Source & free alternative to Origami SMTP.
MailHog is an email testing tool inspired by MailCatcher, but easier to install.

Capture SMTP traffic from staging and dev environments. Easily validate email content text or HTML/CSS. Utilize an Email Sandbox to thoroughly examine and troubleshoot emails within staging, development, and quality assurance (QA) environments prior to sending them to recipients...

MailMug.net is the most popular Web-based alternative to Origami SMTP.
Mailtrap is an Email Delivery Platform for businesses and individuals to Test, Send, and Control their email infrastructure performance.



Papercut is a simplified SMTP server designed to only receive messages (not to send them on) with a GUI on top of it allowing you to see the messages it receives.




FakeSMTP is a Free Fake SMTP Server with GUI for testing emails in applications easily. It is written in Java.



MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a web interface. Run mailcatcher, set your favourite app to deliver to smtp://127.0.0.1:1025 instead of your default SMTP server, then check out http://127.0.0.



Email Testing for QA & Development Teams. Catch every email your product sends, analyze it's contents, follow links and test deliverability all via the Mailosaur API.

Mailosaur is the most popular commercial alternative to Origami SMTP.
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.


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



MailDev is a 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.

MailDev is the most popular Self-Hosted alternative to Origami SMTP.