Looking for feedback on a browser-only email preflight checker

I just put together a small project called Spam Risk Reviewer.

It is a browser-only preflight checklist for email campaign risk signals. The current version checks caller-provided SPF/DKIM/DMARC status, bounce rate, complaint rate, list age, sender warm-up time, policy presets, and a few simple wording risks.

Live demo:

https://spam-risk-reviewer.wt820101.workers.dev

Source:

https://github.com/Li-AmG/spam-risk-reviewer

I kept the first version intentionally simple: no login, no analytics, no AI call, and no campaign upload. The goal is to make a practical checklist that helps someone pause before sending a risky campaign.

I would really appreciate feedback on a few things:

1. Are these the right first signals for a lightweight pre-send checklist?

2. Are the Conservative / Standard / Lenient presets clear enough?

3. What would you want to see before sharing this with a growth team, ESP, or compliance reviewer?

4. Is anything on the page easy to misunderstand?

Clear limits: this is not a deliverability guarantee, DNS verifier, or permission-to-send system. It is an early checklist-style tool, and I am trying to keep the wording honest before building more features.