com4datacenter.com.br

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

The basics are in place but can be hardened.

3Pass
2Warning
0Fail
1Not set

SPF

Pass

Authorizes which servers may send mail for the domain

SPF is published and within limits.

Policy: -all
DNS lookups: 2 / 10

Ends in -all (hardfail): unauthorized senders are rejected.
Uses 2 of 10 allowed DNS lookups.

v=spf1 +a +mx +ip4:189.90.130.0/23 -all

DKIM

Pass

Cryptographically signs outgoing mail (best-effort selector probe)

DKIM key published for 1 known selector.

Selectors: default

Found a DKIM key at default._domainkey.com4datacenter.com.br

DMARC

Warning

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

DMARC is published but not fully enforcing.

Policy: p=none
Subdomains: sp=none
Coverage: 100%

Policy p=none: DMARC is in monitoring mode only and does not block spoofed mail.
No rua address: you receive no aggregate reports to monitor abuse.

v=DMARC1; p=none; fo=0; adkim=r; aspf=r; pct=100; rf=afrf; ri=86400; sp=none

MTA-STS

Not set

Enforces TLS for inbound mail and prevents downgrade attacks

No MTA-STS policy. Inbound mail can be delivered without TLS.

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

Warning

Displays your verified brand logo in supporting inboxes

BIMI is published with caveats.

BIMI record has no l= logo URL.
BIMI requires an enforcing DMARC policy (quarantine or reject) to be honored.

v=BIMI1;l=;a=

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.