Free Newsletter Software: phpList.org

phpList is an open-source software for sending email newsletters, marketing campaigns & announcements. It is 100% free and can send to millions of subscribers or just to a few hundred. You can use your own customized email template if you wish & after your campaign is processed you can find useful statistics and make your own conclusions.
According to G, phpList has very intuitive functions and features that are self-explanatory and easy to understand, even for a new user. The features are much more advanced than the competitors.
When comparing phpList to their competitors, it has a low cost ranking of 3.6/.