MailMug.net is described as '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' and is an website in the security & privacy category. There are more than 25 alternatives to MailMug.net, not only websites but also apps for a variety of platforms, including Mac, Windows, Linux and SaaS apps. The best MailMug.net alternative is Mailpit, which is both free and Open Source. Other great sites and apps similar to MailMug.net are MailHog, Mailcatch.app, Mailtrap and Papercut.
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 MailMug.net.
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.
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.
Sendria is the most popular Self-Hosted alternative to MailMug.net.
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.
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.
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.
Sunnybox is a fully featured hosted service for handling your email accounts. Fetch, send and analyze your emails through a single, robust API. Easy email processing for developers.
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