Self Plug-in: We are currently beta testing Hyvor Relay [0], a self-hosted alternative for sending emails. We are focusing more on observability (monitoring DKIM/SPF, periodically querying DNSBLs) and DNS automation.

A simple docker compose up can get a reasonably working setup [1]

[0]https://github.com/hyvor/relay [1]https://relay.hyvor.com/hosting/deploy-easy