testmail.app is described as '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' and is a automated testing tool in the development category. There are more than 25 alternatives to testmail.app for a variety of platforms, including Web-based, Windows, Linux, Mac and SaaS apps. The best testmail.app alternative is MailGrab, which is free. Other great apps like testmail.app are Mailpit, MailHog, Mailcatch.app and Mailtrap.
Debug your emails. Drop MailGrab's SMTP into your staging .env. Every email your app fires — welcome messages, password resets, invoices — shows up here instead. HTML rendered, headers readable, nothing reaches real inboxes.
An email sandbox to inspect and debug emails in dev, staging, and QA environments before sending them to recipients in production.
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...
FakeSMTP is a Free Fake SMTP Server with GUI for testing emails in applications easily. It is written in Java.
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.
EmailVoid is email message receive service that provides API to check that message reaches your expectation.
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.
Create email addresses on demand. Send and receive real emails and attachments from code. Rest API and developer kits available.
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