LunaticSMTP - Dummy SMTP server with JavaFX gui for testing email sending applications - anlar/lunaticsmtp
MailHog - MailHog is an email testing tool inspired by MailCatcher, but easier to install.
Mailtrap - Email Delivery Platform that delivers just in time. Great for businesses and individuals.
MailCatcher - MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a...
MailSpons - Fake SMTP server for safe email testing. Stop accidentally spamming your customers.
Mailosaur - Email Testing for QA & Development Teams.