3 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
Run the mail configuration check (MX, SPF, DMARC) on up to 20 domains in one request. Results keep the input order, and items that fail for a technical reason come with a token for a free retry. Use when an agent must au...
TXT record of _mta-sts.<domain>: looks up the _mta-sts host under the domain you give (TXT via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like _mta-sts with...
MTA-STS and TLS-RPT check for a domain: the _mta-sts DNS record, the published policy file (mode enforce/testing/none, allowed MX, max_age) fetched from mta-sts.<domain>, and the _smtp._tls TLS reporting record. Tells yo...