Sendria (formerly MailTrap) is a SMTP server designed to run in your dev/test environment, that is designed to catch any email you or your application is sending, and display it in a web interface instead of sending to real world.

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.
Sendria (formerly MailTrap) is a SMTP server designed to run in your dev/test environment, that is designed to catch any email you or your application is sending, and display it in a web interface instead of sending to real world.

QA tool for automating end-to-end email tests. Get unlimited private email addresses and inboxes for testing new user signups, transactional emails and drip campaigns, deliverability and spam scores, etc. Integrates with your CI/CD workflow. Includes spam testing.



testmail.app is the most popular SaaS alternative to Origami SMTP.
A local SMTP server with email display, used mostly for development of other apps. Think unlimited Mailtrap that runs on your own computer.


A fake SMTP server for e-mail integration testing. We capture all the e-mails we receive and make them available via our website and REST API.
Fake SMTP server for safe email testing. Stop accidentally spamming your customers.




Imitate Email is a fake SMTP server for developers and testers. It includes an embeddable widget so that testers can quickly see sent emails alongside the app they're testing.


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.




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.
