After explaining SPF, DKIM, or DMARC, give the reader a concrete next step: run their own domain through a free check before changing DNS. Beacon gives a no-signup view of public authentication signals and relevant blocklist status.
Keep the tutorial complete without the link. The tool is an optional diagnostic, not proof that every email problem is solved. Explain optional monitoring only for readers who need ongoing visibility.
Disclose any tracked link. Beacon pays 50% recurring for life, with a 30-day cookie.