Cost / License
- Free
- Open Source (MIT)
Platforms
- Mac
- Windows
- Linux

Mailpit is the most popular Windows, Mac & Linux alternative to FakeSMTP.
Mailpit is the most popular Open Source & free alternative to FakeSMTP.
- Mailpit is Free and Open Source
FakeSMTP is described as 'Free Fake SMTP Server with GUI for testing emails in applications easily. It is written in Java' and is an app in the development category. There are more than 10 alternatives to FakeSMTP for a variety of platforms, including Web-based, Windows, Linux, Mac and SaaS apps. The best FakeSMTP alternative is Mailpit, which is both free and Open Source. Other great apps like FakeSMTP are MailHog, Mailcatch.app, Papercut and Mailtrap.

Mailpit is the most popular Windows, Mac & Linux alternative to FakeSMTP.
Mailpit is the most popular Open Source & free alternative to FakeSMTP.

An email sandbox to inspect and debug emails in dev, staging, and QA environments before sending them to recipients in production.

Mailcatch.app is the most popular Web-based alternative to FakeSMTP.
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.




Windows native app with helpful message rendering.
Very good GUI on windows with a lot of configuration options and viewable headers etc.


Mailtrap is an Email Delivery Platform for businesses and individuals to Test, Send, and Control their email infrastructure performance.



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...

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



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.


Should be rated a lot higher. Excellent free alternative to Mailtrap