Identity
54
C
improvmx.com
Posture Score: 74/100
Scanned May 9, 2026 at 1:04 AM UTC
Attack Surface
80
Reputation
88
Identity Findings
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.improvmx.com
BIMI logo may not be SVG Tiny PS
The logo URL returns Content-Type: . BIMI requires SVG Tiny PS format.
💡 Ensure the logo is in SVG Tiny PS format.
Generic ISP PTR hostname: ec2-13-37-195-136.eu-west-3.compute.amazonaws.com
The PTR record for 13.37.195.136 appears to be a generic ISP hostname, which can harm deliverability.
💡 Set a meaningful PTR record like mail.improvmx.com
Generic ISP PTR hostname: ec2-35-181-18-45.eu-west-3.compute.amazonaws.com
The PTR record for 35.181.18.45 appears to be a generic ISP hostname, which can harm deliverability.
💡 Set a meaningful PTR record like mail.improvmx.com
Generic ISP PTR hostname: ec2-15-236-236-160.eu-west-3.compute.amazonaws.com
The PTR record for 15.236.236.160 appears to be a generic ISP hostname, which can harm deliverability.
💡 Set a meaningful PTR record like mail.improvmx.com
Generic ISP PTR hostname: ec2-13-36-222-39.eu-west-3.compute.amazonaws.com
The PTR record for 13.36.222.39 appears to be a generic ISP hostname, which can harm deliverability.
💡 Set a meaningful PTR record like mail.improvmx.com
Generic ISP PTR hostname: ec2-13-36-107-63.eu-west-3.compute.amazonaws.com
The PTR record for 13.36.107.63 appears to be a generic ISP hostname, which can harm deliverability.
💡 Set a meaningful PTR record like mail.improvmx.com
Generic ISP PTR hostname: ec2-15-236-61-92.eu-west-3.compute.amazonaws.com
The PTR record for 15.236.61.92 appears to be a generic ISP hostname, which can harm deliverability.
💡 Set a meaningful PTR record like mail.improvmx.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.
No PTR record for IPv6 address: 2a05:d012:412:e202:f36:2c1f:1a49:d38a
The IPv6 address 2a05:d012:412:e202:f36:2c1f:1a49:d38a for mx1.improvmx.com has no reverse DNS record.
💡 Configure a PTR record for the IPv6 address.
No PTR record for IPv6 address: 2a05:d012:412:e201:88aa:e7b9:7a43:12d7
The IPv6 address 2a05:d012:412:e201:88aa:e7b9:7a43:12d7 for mx1.improvmx.com has no reverse DNS record.
💡 Configure a PTR record for the IPv6 address.
No PTR record for IPv6 address: 2a05:d012:412:e203:373a:f51a:4a85:1d25
The IPv6 address 2a05:d012:412:e203:373a:f51a:4a85:1d25 for mx1.improvmx.com has no reverse DNS record.
💡 Configure a PTR record for the IPv6 address.
No PTR record for IPv6 address: 2a05:d012:412:e203:7e33:3d9c:28d7:ee20
The IPv6 address 2a05:d012:412:e203:7e33:3d9c:28d7:ee20 for mx2.improvmx.com has no reverse DNS record.
💡 Configure a PTR record for the IPv6 address.
No PTR record for IPv6 address: 2a05:d012:412:e201:1f6e:f6e4:8fd7:4678
The IPv6 address 2a05:d012:412:e201:1f6e:f6e4:8fd7:4678 for mx2.improvmx.com has no reverse DNS record.
💡 Configure a PTR record for the IPv6 address.
No PTR record for IPv6 address: 2a05:d012:412:e202:e81e:cc44:3b53:8a3d
The IPv6 address 2a05:d012:412:e202:e81e:cc44:3b53:8a3d for mx2.improvmx.com has no reverse DNS record.
💡 Configure a PTR record for the IPv6 address.
Very low TTL on SPF record: 267s
The SPF record has a TTL of 267s or less (below 300s).
💡 Increase the TTL to at least 300 seconds unless frequent changes are expected.
Very low TTL on TXT records: 267s
3 TXT records have a TTL of 267s or less (below 300s).
💡 Increase the TTL to at least 300 seconds unless frequent changes are expected.
NS TTL mismatch between parent and authoritative zone
The NS record TTL in the parent zone (~7167s) differs significantly from the authoritative zone (~86400s).
💡 Align NS record TTLs between the parent zone delegation and the authoritative zone.
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.
MTA-STS and TLS-RPT are properly configured
MTA-STS policy is enforced and TLS reporting is 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.
STARTTLS downgrade resistance is adequate
STARTTLS is supported with modern TLS and protected by MTA-STS and/or DANE.
NS delegation is properly configured
All nameservers are responsive, consistent, and properly secured.
DNS responses are consistent across all nameservers
All authoritative nameservers return consistent answers with proper AA flags.
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.
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.
Deprecated DMARCbis tags found: pct
The DMARC record contains tags deprecated in DMARCbis: pct. Consider removing these for forward compatibility.
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.
Shared/free email hosting detected: mx1.improvmx.com
The MX record points to a known shared or free email hosting provider.
Shared/free email hosting detected: mx2.improvmx.com
The MX record points to a known shared or free email hosting provider.
No DANE/TLSA records found
DANE is not configured for any MX server. This is optional but provides strong certificate binding.
Open mail ports on mx1.improvmx.com
Detected open mail-related ports: 25, 465, 587
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
MX IPs span 4 different /16 networks, providing good diversity.
SOA record parameters
Serial: 2402843340, Refresh: 10000s, Retry: 2400s, Expire: 604800s, Min TTL: 1800s
Authorized certificate authorities
CAA records restrict certificate issuance to: amazonaws.com, comodoca.com, digicert.com; cansignhttpexchanges=yes, letsencrypt.org, pki.goog; cansignhttpexchanges=yes, ssl.com
Attack Surface Findings
NSEC records enable zone walking
The domain uses NSEC records for DNSSEC authenticated denial of existence. NSEC records can be walked to enumerate all names in the zone, effectively disclosing the entire zone contents.
💡 Switch from NSEC to NSEC3 with opt-out to prevent zone enumeration. Use NSEC3 with a random salt and sufficient iterations.
Domain enumerability: high
The domain is highly enumerable. Zone transfers, NSEC zone walking, or a combination of factors make it easy to discover all DNS records.
💡 Restrict zone transfers, use NSEC3 instead of NSEC, consider wildcard certificates to reduce CT log exposure, and implement rate limiting on DNS queries.
NSEC used instead of NSEC3 (zone enumeration possible)
The domain uses NSEC records for authenticated denial of existence. NSEC allows zone walking.
💡 Migrate from NSEC to NSEC3 to prevent zone enumeration.
No internal information leakage detected
No non-routable IP addresses or internal references were found in public DNS records.
No email autodiscovery endpoints detected
No Microsoft Autodiscover, Mozilla Autoconfig, or email SRV records were found.
12 subdomain(s) discovered for improvmx.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 improvmx.com and its subdomains. Each certificate reveals subdomain names.
DNSSEC is enabled
DNSKEY and/or DS records are present, indicating DNSSEC is configured.
Reputation Findings
Missing domain locks: clientDeleteProhibited
Domain improvmx.com is missing protective locks: clientDeleteProhibited.
💡 Enable clientTransferProhibited and clientDeleteProhibited locks through your registrar to prevent unauthorized transfers or deletions.
Missing Strict-Transport-Security on improvmx.com
The Strict-Transport-Security header is not set on https://improvmx.com.
💡 Add the Strict-Transport-Security header with a max-age of at least 31536000 (1 year) and include the includeSubDomains directive.
security.txt present
Found security.txt at https://improvmx.com/.well-known/security.txt.
TLS certificate valid for 79 days
Certificate for improvmx.com expires on 2026-07-27.
Certificate issued by WE1
The certificate for improvmx.com is issued by a third-party CA.
Signature algorithm: ecdsa-with-sha256
The certificate for improvmx.com uses an acceptable signature algorithm.
ECC key: 256 bits
The certificate for improvmx.com uses an adequate ECC key of 256 bits.
SCTs present in certificate
The certificate for improvmx.com contains Signed Certificate Timestamps.
No weak ciphers detected
No known weak cipher suites detected on improvmx.com.
Domain valid for 101 days
Domain improvmx.com expires on 2026-08-18.
TLD has good reputation
The .com TLD is not on known abuse watchlists.
DMARC reporting destinations look legitimate
DMARC rua/ruf addresses do not point to known URL shortener services.
MX records point to stable infrastructure
No MX records point to known dynamic DNS service domains.
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.improvmx.com
HTTPS request to https://webmail.improvmx.com failed or timed out.
WHOIS registration data
Registrar: Cloudflare, Inc. | Created: 2013-08-18 | Expires: 2026-08-18 | Updated: 2025-01-16
WHOIS privacy protection enabled
Domain improvmx.com has WHOIS privacy/redaction enabled.
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: quarantine
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: quarantine
⚠️ 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: mx1.improvmx.com
PTR record proves mail server legitimacy
MX: mx1.improvmx.com
Mail server at 13.37.195.136
→
PTR Record
Reverse DNS: ec2-13-37-195-136.eu-west-3.compute.amazonaws.com
Mail Server Identity: mx2.improvmx.com
PTR record proves mail server legitimacy
MX: mx2.improvmx.com
Mail server at 13.36.222.39
→
PTR Record
Reverse DNS: ec2-13-36-222-39.eu-west-3.compute.amazonaws.com
Mail Server Reputation: mx1.improvmx.com
RBL check ensures server is not blacklisted
MX: mx1.improvmx.com
Mail server at 13.37.195.136
→
RBL Status
Not blacklisted
Mail Server Reputation: mx2.improvmx.com
RBL check ensures server is not blacklisted
MX: mx2.improvmx.com
Mail server at 13.36.222.39
→
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
Mode: enforce
Brand Identity Chain
BIMI displays your logo in email clients, but requires DMARC enforcement
DMARC Enforcement
DMARC policy: quarantine
→
BIMI Record
Brand logo configured
TLS Monitoring Chain
TLS-RPT provides reports about TLS connection failures
TLS Support
Mail servers support TLS encryption
→
TLS-RPT Reporting
TLS failure reporting configured
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/improvmx.com.svg" alt="Email Security Grade">
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