https://postalserver.io
Postal is an open source mail platform for sending & receiving e-mails
Postal
📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail
postalserver
📚 Documentation for the Postal mail server!
A Node.js library for the Postal mail platform
A PHP library for the Postal e-mail platform
A Rails library for the Postal e-mail platform
👋 A set of useful tools for installing and running Postal.