Identity
32
D
valero.com
Posture Score: 68/100
Scanned May 8, 2026 at 11:24 PM UTC
Attack Surface
80
Reputation
91
Identity Findings
Missing AA flag on nameserver: ns3.level3.net
The nameserver ns3.level3.net does not set the Authoritative Answer (AA) flag, indicating lame delegation.
💡 Verify that ns3.level3.net is properly configured as an authoritative nameserver.
Missing AA flag on nameserver: ns4.level3.net
The nameserver ns4.level3.net does not set the Authoritative Answer (AA) flag, indicating lame delegation.
💡 Verify that ns4.level3.net is properly configured as an authoritative nameserver.
No DKIM records found
No DKIM records were found for any common selector. Email may not be authenticated.
💡 Configure DKIM signing and publish the public key at <selector>._domainkey.valero.com
Inconsistent DNS responses across nameservers
Authoritative nameservers return different answers for the same query.
💡 Verify zone transfers are working correctly and all nameservers serve the same zone data.
DMARC policy is monitoring-only (p=none)
The p=none policy only monitors; it does not instruct receivers to quarantine or reject unauthenticated mail.
💡 Upgrade to p=quarantine or p=reject after reviewing aggregate reports.
No MTA-STS record found
Without MTA-STS, mail transport encryption cannot be enforced and is vulnerable to downgrade attacks.
💡 Publish a _mta-sts TXT record and host a policy file at https://mta-sts.valero.com/.well-known/mta-sts.txt
STARTTLS without MTA-STS or DANE protection
STARTTLS alone is vulnerable to downgrade attacks. Neither MTA-STS nor DANE is configured to enforce encryption.
💡 Deploy MTA-STS and/or DANE to protect against STARTTLS stripping attacks.
No TLS-RPT record found
Without TLS-RPT, you will not receive reports about TLS negotiation failures.
💡 Publish a _smtp._tls TXT record (e.g. "v=TLSRPTv1; rua=mailto:tls-reports@valero.com").
ARC support not detected
No evidence of ARC (Authenticated Received Chain) support on MX servers. Forwarded messages may lose authentication.
💡 Consider enabling ARC signing on your mail servers to preserve authentication through forwarding.
Shared IP 205.220.174.66 used by multiple MX servers
The IP 205.220.174.66 is shared across 2 MX hostnames, reducing redundancy.
💡 Use unique IP addresses for each MX server for better redundancy.
No CAA iodef tag configured
No iodef tag is present in the CAA records. CA policy violation reports will not be sent.
💡 Add an iodef CAA record. Example: 0 iodef "mailto:security@example.com"
Very low TTL on MX records: 220s
2 MX records have a TTL of 220s or less (below 300s).
💡 Increase the TTL to at least 300 seconds unless frequent changes are expected.
Very low TTL on A record: 240s
The A record has a TTL of 240s or less (below 300s).
💡 Increase the TTL to at least 300 seconds unless frequent changes are expected.
Very low TTL on NS records: 221s
4 NS records have a TTL of 221s or less (below 300s).
💡 Increase the TTL to at least 300 seconds unless frequent changes are expected.
Very low TTL on TXT records: 220s
18 TXT records have a TTL of 220s or less (below 300s).
💡 Increase the TTL to at least 300 seconds unless frequent changes are expected.
Very low TTL on SPF record: 220s
The SPF record has a TTL of 220s or less (below 300s).
💡 Increase the TTL to at least 300 seconds unless frequent changes are expected.
Very low TTL on DMARC record: 220s
The DMARC record has a TTL of 220s or less (below 300s).
💡 Increase the TTL to at least 300 seconds unless frequent changes are expected.
SPF record is valid
The SPF record is properly configured with valid syntax and within lookup limits.
DKIM cryptographic configuration is compliant
No RFC 8301 compliance issues detected in DKIM key configuration.
No deprecated DMARCbis tags present
The DMARC record does not use any tags deprecated in DMARCbis (pct, rf, ri).
MX records are valid
All MX records are properly configured.
SMTP security checks passed
No open relay, VRFY/EXPN, or banner disclosure issues detected.
SMTP RFC 5321 compliance checks passed
The mail server accepts postmaster@ and abuse@ and uses a valid FQDN in EHLO.
NS delegation is properly configured
All nameservers are responsive, consistent, and properly secured.
DKIM2 not detected
No DKIM key record with v=2 was found across common selectors. DKIM2 is an emerging standard and not yet widely deployed.
DMARC alignment: adkim=r, aspf=r
DKIM alignment is relaxed, SPF alignment is relaxed.
DMARC failure reporting: fo=1
Failure reports generated when any authentication mechanism fails.
DMARCbis np tag absent
The DMARC record does not include the np (non-existent subdomain policy) tag. Consider adding np=reject to protect non-existent subdomains under DMARCbis.
DMARCbis psd tag absent
The DMARC record does not include the psd (public suffix domain) indicator. Consider adding psd=n to explicitly identify this as an organizational domain.
No DANE/TLSA records found
DANE is not configured for any MX server. This is optional but provides strong certificate binding.
No BIMI record found
BIMI is not configured. Your brand logo will not display in supporting email clients.
Open mail ports on mxb-005ffb01.gslb.pphosted.com
Detected open mail-related ports: 25
Domain is IPv4-only
No AAAA records found for the domain, MX servers, or nameservers. The domain operates on IPv4 only.
RFC 8058 one-click unsubscribe assessment
No DKIM signing detected. RFC 8058 one-click unsubscribe requires DKIM-signed List-Unsubscribe headers.
MX IP network diversity
All MX IPs are in the same /16 network. Consider diversifying across networks for resilience.
SOA record parameters
Serial: 2026042700, Refresh: 7200s, Retry: 3600s, Expire: 604800s, Min TTL: 3600s
Authorized certificate authorities
CAA records restrict certificate issuance to: godaddy.com, digicert.com
Attack Surface Findings
Non-responsive IP for ftp.valero.com: 170.111.5.77
The subdomain ftp.valero.com resolves to 170.111.5.77 which is not responding on ports 80 or 443. This may indicate a decommissioned server.
💡 Verify the server at 170.111.5.77 is operational or remove the DNS record for ftp.valero.com.
Non-responsive IP for ns2.valero.com: 170.111.4.4
The subdomain ns2.valero.com resolves to 170.111.4.4 which is not responding on ports 80 or 443. This may indicate a decommissioned server.
💡 Verify the server at 170.111.4.4 is operational or remove the DNS record for ns2.valero.com.
Non-responsive IP for remote.valero.com: 170.111.5.105
The subdomain remote.valero.com resolves to 170.111.5.105 which is not responding on ports 80 or 443. This may indicate a decommissioned server.
💡 Verify the server at 170.111.5.105 is operational or remove the DNS record for remote.valero.com.
Domain enumerability: medium
The domain has moderate enumerability. CT logs and DNS records reveal significant information about the domain structure.
💡 Restrict zone transfers, use NSEC3 instead of NSEC, consider wildcard certificates to reduce CT log exposure, and implement rate limiting on DNS queries.
DNSSEC is not enabled
No DNSKEY or DS records were found. DNS responses are not cryptographically authenticated.
💡 Enable DNSSEC by generating DNSKEY records and publishing DS records at the registrar.
No internal information leakage detected
No non-routable IP addresses or internal references were found in public DNS records.
No excessive DNS information exposure detected
No HINFO, LOC, RP records, version disclosures, or zone walking vulnerabilities were found.
No email autodiscovery endpoints detected
No Microsoft Autodiscover, Mozilla Autoconfig, or email SRV records were found.
8 subdomain(s) discovered for valero.com
Subdomains were enumerated via Certificate Transparency logs, DNS wordlist brute-forcing, and DNS record analysis.
0 certificate(s) found in CT logs
Certificate Transparency logs contain 0 certificate(s) for valero.com and its subdomains. Each certificate reveals subdomain names.
Reputation Findings
Missing domain locks: clientDeleteProhibited
Domain valero.com is missing protective locks: clientDeleteProhibited.
💡 Enable clientTransferProhibited and clientDeleteProhibited locks through your registrar to prevent unauthorized transfers or deletions.
HSTS enabled but missing preload directive on valero.com
Strict-Transport-Security: max-age=300
💡 Add the "preload" directive to the HSTS header and submit the domain to hstspreload.org.
security.txt present
Found security.txt at https://valero.com/.well-known/security.txt.
TLS certificate valid for 63 days
Certificate for valero.com expires on 2026-07-10.
Certificate issued by DigiCert Global G2 TLS RSA SHA256 2020 CA1
The certificate for valero.com is issued by a third-party CA.
Signature algorithm: rsa-sha256
The certificate for valero.com uses an acceptable signature algorithm.
RSA key: 2048 bits
The certificate for valero.com uses an adequate RSA key of 2048 bits.
SCTs present in certificate
The certificate for valero.com contains Signed Certificate Timestamps.
No weak ciphers detected
No known weak cipher suites detected on valero.com.
Domain valid for 289 days
Domain valero.com expires on 2027-02-22.
Google Safe Browsing DNS check — no flag detected
DNS-based Safe Browsing lookup returned no results. Full verification requires the Google Safe Browsing API key.
Abuse contact lookup failed
Could not query abuse contact information.
PhishTank — API key required
PhishTank phishing database check requires an API key.
Sender Score — API key required
Sender Score reputation check requires an API key.
Cisco Talos — API key required
Cisco Talos IP reputation check requires an API key.
Could not connect to webmail.valero.com
HTTPS request to https://webmail.valero.com failed or timed out.
WHOIS registration data
Registrar: Network Solutions, LLC | Created: 1996-02-21 | Expires: 2027-02-22 | Updated: 2025-12-02
WHOIS privacy protection not detected
Domain valero.com does not appear to have WHOIS privacy protection. Registrant details may be publicly visible.
Dependency Chains
DMARC Authentication Chain (SPF)
DMARC uses SPF to verify that emails come from authorized servers
SPF Record
SPF record found and configured
→
DMARC Policy
DMARC policy: none
DMARC Authentication Chain (DKIM)
DMARC uses DKIM to verify that emails have not been tampered with
DKIM Signature
DKIM signature missing
→
DMARC Policy
DMARC policy: none
⚠️ DKIM signature is missing. DMARC relies on DKIM to verify email integrity and prevent tampering. Without DKIM, DMARC alignment will fail for cryptographic verification.
Mail Server Identity: mxb-005ffb01.gslb.pphosted.com
PTR record proves mail server legitimacy
MX: mxb-005ffb01.gslb.pphosted.com
Mail server at 205.220.174.66
→
PTR Record
Reverse DNS: mx0b-005ffb01.pphosted.com
Mail Server Identity: mxa-005ffb01.gslb.pphosted.com
PTR record proves mail server legitimacy
MX: mxa-005ffb01.gslb.pphosted.com
Mail server at 205.220.174.66
→
PTR Record
Reverse DNS: mx0b-005ffb01.pphosted.com
Mail Server Reputation: mxb-005ffb01.gslb.pphosted.com
RBL check ensures server is not blacklisted
MX: mxb-005ffb01.gslb.pphosted.com
Mail server at 205.220.174.66
→
RBL Status
Not blacklisted
Mail Server Reputation: mxa-005ffb01.gslb.pphosted.com
RBL check ensures server is not blacklisted
MX: mxa-005ffb01.gslb.pphosted.com
Mail server at 205.220.174.66
→
RBL Status
Not blacklisted
Enforced Encryption Chain
MTA-STS enforces TLS encryption to prevent man-in-the-middle attacks
TLS Support
Mail servers support TLS encryption
→
MTA-STS Policy
MTA-STS not configured
⚠️ MTA-STS policy is missing. Even with TLS support, you lack the enforcement layer that prevents attackers from stripping encryption (downgrade attacks).
Brand Identity Chain
BIMI displays your logo in email clients, but requires DMARC enforcement
DMARC Enforcement
DMARC not enforced (p=none or missing)
→
BIMI Record
BIMI not configured
⚠️ DMARC is not enforced. BIMI requires a DMARC policy of "quarantine" or "reject" to prove you have strong email authentication. Without enforcement, email clients will not display your logo.
TLS Monitoring Chain
TLS-RPT provides reports about TLS connection failures
TLS Support
Mail servers support TLS encryption
→
TLS-RPT Reporting
TLS-RPT not configured
⚠️ TLS-RPT is not configured. Without TLS reporting, you have no visibility into TLS connection failures that may be impacting email delivery.
Security Checks
MX Records
✓
SPF Record
✓
DKIM Record
✗
DMARC Policy
✓
BIMI Record
✗
CAA Records
✓
DNSSEC
✗
MTA-STS
✗
TLS-RPT
✗
Embed Badge
Display your domain's security grade on your website or README:
<img src="https://scan.ractermx.com/badge/valero.com.svg" alt="Email Security Grade">
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