Email Security & DNS Tools

Complete Email Authentication & DNS Health Checker

Comprehensive Email & DNS Security Checker

Complete audit of email authentication, DNS health, SSL, SMTP, and blacklist status

Enter domain only (no http/https)
DMARC Record Generator Step 1 of 4
Step 1: Your Domain
Enter your domain without http:// or https://
Step 2: Choose Your Policy
What is DMARC policy?
It tells receiving mail servers what to do with emails that fail authentication.
📊 Monitor Mode (p=none)
Perfect for starting! You'll receive reports but emails won't be affected.
Step 3: Email Reports
💡 Highly Recommended!
Add your email to receive reports about who's sending email on behalf of your domain.
Step 4: Advanced Options (optional)
DKIM Key Generator
🔑 What is DKIM?
DKIM adds a digital signature to your emails proving they're authentic and haven't been tampered with.
Unique identifier (default, mail, k1)
SPF Record Generator
📧 What is SPF?
SPF (Sender Policy Framework) lists which mail servers are authorized to send email for your domain.
Include Email Services
Custom IPs / Includes
Examples: ip4:192.0.2.1, ip6:2001:db8::1, include:example.com
Policy
~all is recommended for most cases
Email Security Guide

The Three Pillars:
  • SPF - Lists authorized mail servers
  • DKIM - Cryptographic email signature
  • DMARC - Policy for failed authentication

Together, they prevent domain spoofing and improve email deliverability.

Adding SPF to DNS:
  1. Login to DNS provider
  2. Add TXT record
  3. Host: @ (root domain)
  4. Value: Your generated SPF record
  5. Save and wait for propagation
⚠️ Important: Only ONE SPF record per domain. Combine all sources with include:.

  1. Generate keys in DKIM tab
  2. Add public key to DNS as TXT record
  3. Add private key to mail server
  4. Test with email header checker

Rollout Strategy:
  1. p=none; pct=100 - Monitor for 2-4 weeks
  2. p=quarantine; pct=10 - Test on 10%
  3. p=quarantine; pct=100 - Full quarantine
  4. p=reject; pct=100 - Maximum protection
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