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anthropic.com

85/100

A

Scanned 2026-05-12

Cached result — add ?fresh=1 to force a new scan

Subcheck breakdown

Check	Status	Score
DMARC policy	reject	25/25
SPF record	ok	10/10
DKIM selector	found	10/10
TLS certificate	ok	20/20
WHOIS integrity	whois rate limited	5/10
Subdomain takeover	clean	15/15
MTA-STS / TLSRPT	missing	0/5
DNSSEC	unsigned	0/5

Recommendations

Publish MTA-STS: add _mta-sts.anthropic.com TXT and host a policy at https://mta-sts.anthropic.com/.well-known/mta-sts.txt
Enable DNSSEC on anthropic.com — DS records must be published to the com zone by your registrar

Details

Area	Detail
DMARC	v=DMARC1; p=reject; sp=reject; rua=mailto:f0cef134490d4d43b9c134fc3c2a3481@dmarc-reports.cloudflare.net,mailto:dmarc-reports@anthropic.com; ruf=mailto:dmarc-reports@anthropic.com; fo=1
SPF	v=spf1 include:_spf.google.com ~all
DKIM selectors	google
TLS certificate	Ok (55 days remaining) — CN=E8,O=Let's Encrypt,C=US
WHOIS registrar	—
WHOIS expires	—
Subdomains (78 subdomains scanned, 0 at risk)	78 found
DNSSEC	Unsigned