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.

Coming soon

DNS propagation check

Whether a record change has reached the major public resolvers yet.

Coming soon

SSL certificate check

Who issued a domain's certificate, when it expires, and how many days are left.

Coming soon

HTTP security headers

Which security headers a site sends — HSTS, CSP, X-Frame-Options and the rest.

Coming soon

MX and mail servers

Where a domain's mail goes, and which servers answer for it.

About these tools

Built for our own fleet first.

01

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.

02

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.

03

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.