What is dmarcguard?

Parse DMARC is a self-hosted tool for processing DMARC aggregate reports. It connects to an IMAP mailbox or reads a local Maildir, extracts gzip, zip, and raw XML attachments, and saves the parsed data into a single SQLite database. A web UI displays pass rates, message volumes, and top sending sources with the ability to inspect individual records. The software also generates DMARC TXT records, exposes 28 Prometheus metrics with a ready-made Grafana dashboard, and runs an MCP server so AI assistants can query the data. It ships as one static Go binary in a minimal container, configured through environment variables or a JSON file. There is no built-in authentication, so the dashboard should sit behind a reverse proxy or VPN. The project is developed by the same team behind the hosted DMARCguard service, but the codebases are separate and Parse DMARC stays fully Apache-2.0 licensed.

Should you self-host dmarcguard?

dmarcguard scores 50/100 on selfhost.directory (how scoring works) and ranks #56 of 106 in Email. It has 223 GitHub stars.

It shipped 18 stable releases in the past year. The latest, v1.7.2, came out on 25 October 2026. New versions land roughly every 8 days.

Setup is moderate: expect some configuration beyond a single command. An official Docker image is available. It is Apache-2.0-licensed and written mostly in Go.

Its closest alternative on selfhost.directory is Listmonk (80/100, 24 019 stars). It scores higher overall, so compare the two before you pick. See dmarcguard vs Listmonk side by side.