I run WebCareShelf, a set of focused checks for people maintaining small websites and communities. You can try the free results without signing up.
Website health: check HTTPS, certificate/domain expiry, security headers, email records and search basics. The free result gives a score and the top three issues; the optional Full Website Health Report lists all 19 checks and a fix pack for your host and email provider ($9 USD plus applicable tax).
https://guides.webcareshelf.com/check/
Email/DNS health: inspect MX, SPF, DKIM, DMARC, MTA-STS, TLS reporting and DNSSEC. It reads public information and sends no email; it cannot measure actual inbox placement. Free score/top three issues, with an optional full report for $9 USD plus applicable tax.
https://guides.webcareshelf.com/email-check/
Site audit: the free run checks up to 10 pages for broken pages, redirects, titles/descriptions, headings, image alt text and sitemap issues. The optional $12 USD full audit (plus applicable tax) covers up to 200 pages with affected addresses and CSV export.
https://guides.webcareshelf.com/site-audit/
Catalog and checkout: https://shop.webcareshelf.com/
These tools provide inspection results and guidance, not automatic website/DNS repairs or a comprehensive security audit. Disclosure: WebCareShelf is my business; I use AI assistance for development and this post.
For fellow site admins: the free checks are a way to get a short list to review before deciding whether you need the full detail.