Dada Mail : Dada Mail is a Contemporary Mailing List Manager, enabling you to easily run a verified mailing list that your subscribers can trust, right on your ow...
SimpleLogin : With email aliases , you can be anonymous online and protect your inbox against spams and phishing. Open-source.
Cachet : Beautiful & simple service statuses. The open source status page system, for everyone.
arkOS : A project to help users self-host their websites, email, files and more. Decentralize your web and reclaim your privacy rights while keeping the conve...
Open WebMail Project : Open WebMail is a webmail system based on the Neomail version 1.14 from Ernie Miller. Open WebMail is designed to manage very large mail folder files ...
Maily Herald is a Ruby on Rails engine that helps you send and manage your mailings.
Think of Maily as a self-hosted Mailchimp® you can easily integrate with your site.