DNS Mail Security Check
Analyze your domain's email authentication and security settings including SPF, DMARC, and DKIM records. Get comprehensive insights to protect your business email from threats.
Understanding Email Security
Email authentication is critical for protecting your business from phishing, spoofing, and email-based cyber attacks. Our comprehensive analysis checks the three pillars of email security.
SPF Records
Sender Policy Framework (SPF) prevents email spoofing by specifying which servers can send emails from your domain. Without proper SPF configuration, cybercriminals can easily impersonate your business.
Risk: Emails may be marked as spam or rejected entirely.
DMARC Policy
Domain-based Message Authentication prevents email fraud by telling receiving servers what to do with emails that fail SPF or DKIM checks. It's your domain's security policy enforcement.
Risk: Phishing emails using your domain may reach victims.
DKIM Signatures
DomainKeys Identified Mail adds a digital signature to your emails, proving they haven't been tampered with in transit and confirming they're actually from your domain.
Risk: Emails may be flagged as suspicious or fraudulent.
Frequently Asked Questions
Common questions about email security and our analysis tool
How often should I check my email security?
We recommend checking your email security monthly or whenever you make changes to your email setup. DNS changes can take time to propagate, and regular monitoring helps catch configuration drift.
What happens if my DMARC policy is set to 'none'?
A DMARC policy of 'none' means you're only monitoring but not enforcing email authentication. While this provides visibility, it doesn't protect against email spoofing. Consider upgrading to 'quarantine' or 'reject' policies.
Why is my SPF lookup count high?
SPF records have a limit of 10 DNS lookups. High counts can cause SPF failures and email delivery issues. This often happens when including multiple third-party services. Consider flattening your SPF record.
Can I fix these issues myself?
Many email security issues require DNS changes that should be handled by IT professionals. Incorrect configurations can break email delivery. Our team can help implement these changes safely.
Understanding Your Results
Learn how to interpret your email security analysis and take action
Good Configuration
- • SPF record exists with proper mechanisms
- • DMARC policy set to 'quarantine' or 'reject'
- • DKIM signatures with 2048-bit keys
- • MX records pointing to reputable providers
- • DNS configured with redundant nameservers
Needs Attention
- • Missing or misconfigured SPF record
- • DMARC policy set to 'none' or missing
- • Weak DKIM keys (1024-bit or missing)
- • SPF lookup count exceeding 10
- • Conflicting or missing DNS records
Need Help Implementing Changes?
Email security configuration can be complex and mistakes can break email delivery. Our certified IT professionals can safely implement these changes and monitor your email security ongoing.
Why Choose Our Email Security Checker
Comprehensive analysis that goes beyond basic DNS lookups
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AI-Powered Analysis
Get intelligent recommendations and explanations, not just raw DNS data
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Deep DNS Analysis
Comprehensive hosting, registrar, and infrastructure analysis with threat intelligence
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Visual Reports
Easy-to-understand reports you can share with your team or IT provider
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Expert Validation
Built by SOC 2 certified IT professionals with 20+ years of email security experience
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Real-Time Analysis
Live DNS queries and current configuration status, not cached results
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Privacy Focused
Your domain data is analyzed securely and never shared with third parties