Ethereal Email is described as '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' and is a Mail Server in the office & productivity category. There are more than 25 alternatives to Ethereal Email, not only websites but also apps for a variety of platforms, including Mac, Windows, Linux and SaaS apps. The best Ethereal Email alternative is Mailpit, which is both free and Open Source. Other great sites and apps similar to Ethereal Email are MailHog, Mailtrap, MailMug.net and FakeSMTP.
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.
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.
Poland
EU
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 local SMTP server with email display, used mostly for development of other apps. Think unlimited Mailtrap that runs on your own computer.
FranceEU
Ukraine
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.
United Kingdom
Mailnest is an all in one email QA tool for development & testing teams in IT companies to test & improve email functionality.
United Kingdom
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.
United States
Disposable email inboxes via API for testing signup and authentication flows, with automatic extraction of one-time passwords and magic links.
