Check the SSL certificate, DNS, redirects, security headers and email records of any domain.
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FAQ
DNS records, SSL certificate, redirect chain, security headers, email records (MX/SPF/DKIM/DMARC) and availability — in one report.
They protect your email from spoofing and spam folders. Without them your domain is easier to forge and your mail is more likely to be marked as spam.
An SSL certificate expires. If it lapses, browsers show a warning and some users can't open the site. Renew well ahead of time.
You can save a report at a permalink — it contains only public domain data. The domain and URL are never sent to analytics.