listmonk is a self-hosted, high performance one-way mailing list and newsletter manager. It comes as a standalone binary and the only dependency is a Postgres database. //

Simple API to send arbitrary transactional messages to subscribers using pre-defined templates. Send messages as e-mail, SMS, Whatsapp messages or any medium via Messenger interfaces.

Manage millions of subscribers across many single and double opt-in one-way mailing lists with custom JSON attributes for each subscriber. Query and segment subscribers with SQL expressions.

Use the fast bulk importer (~10k records per second) or use HTTP/JSON APIs or interact with the simple table schema to integrate external CRMs and subscriber databases.

Write HTML e-mails in a WYSIWYG editor, Markdown, raw syntax-highlighted HTML, or just plain text.

Use the media manager to upload images for e-mail campaigns on the server's filesystem, Amazon S3, or any S3 compatible (Minio) backend.