Myzel394/kleckrelay-server ? reverse-engineered prompt

Build me a self hosted email relay service called KleckRelay that lets people create unlimited email aliases, both random ones and custom ones, and use those aliases to receive and send mail safely. The app should strip common email trackers, expand shortened tracking links, and proxy remote images so messages are safer to open. I also want a clean dashboard where users can manage aliases, see reports about suspicious mail or tracking, block senders they do not want, and view the details of each report.

Please include login, optional two factor authentication, and support for multiple languages. It should expose a REST API too, since I want to use it from other tools later. Make it something that can be self hosted easily with clear setup steps, sensible defaults, and configurable settings. If anything in the docs is unclear, look up current docs online and make the implementation practical for local development and Docker based deployment.