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🔗 URL: https://domainguardian.nebiatek.com
DomainGuardian is a free online tool that helps you quickly validate your email security configurations, including SPF, DKIM, and DMARC. Follow these steps to assess your domain’s security:
1️⃣ Visit domainguardian.nebiatek.com
2️⃣ Enter your domain name (e.g., `yourdomain.com`)
3️⃣ Review the results and recommendations, then generate a PDF report if needed.
You Should Know:
1. SPF (Sender Policy Framework)
SPF prevents email spoofing by defining which IPs can send emails for your domain.
Check SPF Record:
dig TXT yourdomain.com | grep "v=spf1"
Example SPF Record:
v=spf1 include:_spf.google.com ~all
2. DKIM (DomainKeys Identified Mail)
DKIM adds a digital signature to verify email authenticity.
Check DKIM Record:
dig TXT default._domainkey.yourdomain.com
Example DKIM Record:
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC...
- DMARC (Domain-based Message Authentication, Reporting & Conformance)
DMARC tells receiving servers how to handle emails failing SPF/DKIM checks.
Check DMARC Record:
dig TXT _dmarc.yourdomain.com
Example DMARC Record:
v=DMARC1; p=quarantine; rua=mailto:[email protected]
4. DANE (DNS-based Authentication of Named Entities)
For advanced security, use DANE with TLS certificates.
Check TLSA Record:
dig TLSA _25._tcp.mail.yourdomain.com
What Undercode Say
Email security is critical against phishing and spoofing. Tools like DomainGuardian simplify security validation, but manual checks with dig, nslookup, and openssl ensure deeper verification.
Additional Linux/Windows Commands:
Check MX Records nslookup -type=mx yourdomain.com Verify SMTP TLS openssl s_client -connect mail.yourdomain.com:25 -starttls smtp Windows: Check DNS Records nslookup -type=txt yourdomain.com
Expected Output:
<blockquote> yourdomain.com v=spf1 include:spf.protection.outlook.com -all _dmarc.yourdomain.com v=DMARC1; p=reject; rua=mailto:[email protected]
Prediction
As email attacks evolve, automated security validation tools will become standard. Future enhancements may include AI-driven anomaly detection in email headers and automated remediation for misconfigurations.
🔗 Try DomainGuardian Now: https://domainguardian.nebiatek.com
IT/Security Reporter URL:
Reported By: Mlavroff Jai – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
