MailDotNull is described as 'Local mail catcher for development. It emulates the HTTP send APIs of popular email providers (Resend, SendGrid, Mailjet, Mailgun, Postmark, Brevo, Amazon SES) plus plain SMTP with STARTTLS and SMTPS' and is an website in the development category. There are eight alternatives to MailDotNull, not only websites but also apps for a variety of platforms, including Mac, Linux, Windows and Docker apps. The best MailDotNull alternative is Postfix, which is both free and Open Source. Other great sites and apps similar to MailDotNull are Mailpit, MailHog, Mailcatch.app and MailMug.net.
Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail. It attempts to be fast, easy to administer, and secure. The software is also known by its former names VMailer and IBM Secure Mailer.
Germany
EU
MailHog is an email testing tool inspired by MailCatcher, but easier to install.
An email sandbox to inspect and debug emails in dev, staging, and QA environments before sending them to recipients in production.
United Kingdom
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.
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.
United States
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.
PolandEU
