Domain and email diagnostics
Free checks for the DNS, mail and TLS configuration behind any domain — live lookups against public infrastructure, no account, nothing stored.
Email authentication
Whether SPF, DKIM, DMARC and MTA-STS are set up — and what each result actually means.
DNS lookup
Every record behind a hostname: A, AAAA, MX, TXT, NS and CNAME.
DNS propagation check
Whether a record change has reached the major public resolvers yet.
SSL certificate check
Who issued a domain's certificate, when it expires, and how many days are left.
HTTP security headers
Which security headers a site sends — HSTS, CSP, X-Frame-Options and the rest.
MX and mail servers
Where a domain's mail goes, and which servers answer for it.
Built for our own fleet first.
They read public records
SPF, DMARC, DNS and certificate data are public by design. These tools read exactly what a mail server or a browser would read — nothing private, nothing stored, no account.
We run them on our own domains
We operate six domains and two SaaS products, and these are the checks we run against them. That’s why the results explain what they mean instead of just printing a record.
There is no catch
Every check is free and the answer is yours to act on. If you’d rather hand the fix to someone, that’s the work Socotra Enterprises does — but nothing here asks you to.