Sendportal - self-hosted tool for sending mailings/newsletters

SendPortal is an email campaign management platform that allows users to easily send newsletters and other communications to subscribers. It is open-source software, meaning that users can customize it to fit their needs. SendPortal offers a variety of features, such as a visual editor for creating email templates and tools for analyzing campaign performance. The platform is aimed at both small and large businesses requiring an effective means of communication with their clients. Additionally, SendPortal is easy to install and use, making it an ideal choice for those just starting with email marketing.