Checkers for mail, DNS and addresses. No account is needed and nothing you enter is stored.
MX, SPF, DKIM, DMARC, MTA-STS and TLS-RPT in one run.
Every mechanism explained, includes followed, lookups counted.
The key behind a selector: type, length, flags.
A correct DMARC record from a few choices.
Hops, delays and authentication results from pasted headers.
The DNS records behind MTA-STS and TLS-RPT.
Can mail apps find the server settings on their own?
TLSA records on the MX hosts, validated or not.
Logo record and the DMARC policy it depends on.
Any record type of any name, with TTLs.
Has your change reached the public resolvers yet?
Do all nameservers answer, authoritatively, with the same serial?
DS at the parent, DNSKEY in the zone, and whether they match.
PTR record of an address and whether it confirms forward.
Registrar, expiry date, status and nameservers from the registry.
Is the name still free? Asks the registry.
Registry data for the three TLDs without RDAP.
Which certificate authorities a domain allows.
