c6p.net

01Overview 02DNS 03WHOIS 04Subdomains 05Email 06TLS

Checking SPF, DKIM, and DMARC

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Tools

DNS Lookup
WHOIS Lookup
RDAP Lookup
Subdomain Finder
Email Security Check
SSL and TLS Certificate Checker

digga is open source under AGPL 3.0.

GitHub

Checking SPF, DKIM, and DMARC

Email authentication

Spoofing protection has gaps that need attention.

4Pass
0Warning
1Fail
1Not set

SPF

Fail

Authorizes which servers may send mail for the domain

SPF is published but misconfigured.

Policy: -all
DNS lookups: >10 / 10

Ends in -all (hardfail): unauthorized senders are rejected.
SPF evaluation needs >10 DNS lookups, over the limit of 10. Receivers return permerror and SPF fails.

v=spf1 ip4:5.161.112.103 ip6:2a01:4ff:f0:a657:: include:sendgrid.net include:spf-c.mailbaby.net include:_spf.myorderbox.com include:_spf.mailhostbox.com ip4:198.89.96.3 ip4:198.89.96.4 ip4:198.89.96.95 -all

DKIM

Pass

Cryptographically signs outgoing mail (best-effort selector probe)

DKIM key published for 2 known selectors.

Selectors: default, mail

Found a DKIM key at default._domainkey.c6p.net
Found a DKIM key at mail._domainkey.c6p.net

DMARC

Pass

Tells receivers what to do with mail that fails SPF and DKIM

DMARC is enforced.

Policy: p=reject
Subdomains: sp=reject
Coverage: 100%

Policy p=reject: failing mail is rejected outright.
Aggregate reports (rua) are configured.

v=DMARC1; p=reject; sp=reject; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1

MTA-STS

Pass

Enforces TLS for inbound mail and prevents downgrade attacks

MTA-STS is enforcing TLS.

Mode: enforce
Max age: 604800s

Policy mode is enforce: TLS is required for inbound mail.

v=STSv1; id=20260603030000;

TLS-RPT

Pass

Receives reports about TLS delivery failures

TLS reporting is configured.

Reports to: mailto:[email protected]

TLS delivery failure reports are being collected.

v=TLSRPTv1; rua=mailto:[email protected]

BIMI

Not set

Displays your verified brand logo in supporting inboxes

No BIMI record. No brand logo is published for inboxes.

Checks query live DNS over Cloudflare and the public MTA-STS policy endpoint. DKIM selectors cannot be listed from DNS, so DKIM detection probes common provider selectors only.