Based on our record, testmail.app should be more popular than Postfix. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Testmail.app - Automate end-to-end email tests with unlimited mailboxes and a GraphQL API. 100 emails/month free forever, unlimited free for open source. - Source: dev.to / almost 3 years ago
I initially checked if it's a phishing link. But it wasn't. Found this funny. If you ever find yourself in a position to test your newly written email module, try out testmail.app (not a sponsored link). Source: almost 3 years ago
Read the documentation on postfix.org and/or buy one of the many available Postfix books (it really helps to understand the Postfix philosophy). Source: about 3 years ago
Mailtrap - Email Delivery Platform that delivers just in time. Great for businesses and individuals.
iRedMail - A fully fledged, free email server solution, an open source project (GPL v2).
Mailosaur - Email Testing for QA & Development Teams.
Zimbra - Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.
MailHog - MailHog is an email testing tool inspired by MailCatcher, but easier to install.
Exim - Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.