Imitate Email Alternatives

MailHog is an email testing tool inspired by MailCatcher, but easier to install.

Open Source

Smtp4dev is an all-in-one SMTP server designed to develop and test emails in your applications.

The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder.

Visit website paid $19.5 / Monthly (Pro)

MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a...

Open Source

FakeSMTP is a Free Fake SMTP Server with GUI for testing emails in applications easily.

Email Delivery Platform that delivers just in time.
 Great for businesses and individuals.

Open Source freemium

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.

Email and SMS testing and development platform for software engineers and QA testers

Open Source freemium

Fake SMTP server for safe email testing. Stop accidentally spamming your customers.

A local SMTP server with email display, used mostly for development of other apps.

Email Testing for QA & Development Teams.

Dummy SMTP server with JavaFX gui for testing email sending applications - anlar/lunaticsmtp

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.

A SMTP server with JavaFX GUI interface, TLS, HTML messages, and attachment support.