Mailtrain is an open source, self-hosted newsletter application that allows you to easily manage your subscriber lists, even with a very large number of subscribers. Whether you have a thousand or a million subscribers, Mailtrain can keep you on top of things by letting you add subscribers manually, through the API, or import from a CSV file. Built on Node.js (v7+) and MySQL (v5.5+ or MariaDB), Mailtrain comes with an excellent set of features, including a wide range of custom fields, list...