Mailnest is described as 'All in one email QA tool for development & testing teams in IT companies to test & improve email functionality' and is an app. There are more than 25 alternatives to Mailnest for a variety of platforms, including Web-based, Windows, Linux, Mac and SaaS apps. The best Mailnest alternative is MailGrab, which is free. Other great apps like Mailnest are Mailpit, MailHog, Mailcatch.app and Mailtrap.
Create email addresses on demand. Send and receive real emails and attachments from code. Rest API and developer kits available.
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.
United Kingdom
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.
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.
France
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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.
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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