Listmonk

Self-hosted newsletter and mailing list manager, an open-source alternative to Mailchimp and Sendinblue. Listmonk handles millions of subscribers with fast bulk delivery, custom subscriber attributes, segmentation, and a built-in template editor. On first deploy the container runs a one-shot --install to set up the PostgreSQL schema automatically. An admin user is created from the generated credentials (username admin, password in this service's env-vars view). Configure your SMTP provider under Admin -> Settings -> SMTP after first login to start sending. Uploaded media persists at /listmonk/uploads; to use it, set the media path to /listmonk/uploads under Admin -> Settings -> Media. Source: GitHub