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Email Security Checker

Check SPF, DKIM, DMARC and protect your domain from email threats

Check Email Security

🛡️ What We Check

Authentication

  • • SPF (Sender Policy Framework)
  • • DKIM (DomainKeys Identified Mail)
  • • DMARC (Domain-based Message Authentication)

Configuration

  • • MX Records (Mail Exchange)
  • • Blacklist Status
  • • Email Reputation

🔐What is Email Authentication?

Email authentication is a set of techniques used to verify the legitimacy of email messages. It protects against:

  • Email Spoofing: Prevent attackers from sending emails on behalf of your domain
  • Phishing Attacks: Protect your customers from fraudulent emails
  • Spam: Improve email deliverability and reputation
  • Domain Abuse: Protect your brand from unauthorized use

🛡️Email Security Protocols

SPF (Sender Policy Framework)

Defines authorized mail servers for your domain. Prevents unauthorized parties from sending emails in your name.

v=spf1 include:_spf.google.com ~all

DKIM (DomainKeys Identified Mail)

Adds a cryptographic signature to emails. Recipients can verify if the email is authentic.

v=DKIM1; k=rsa; p=MIGfMA0GCS...

DMARC (Domain-based Message Authentication)

Specifies how to handle emails that fail SPF/DKIM checks.

v=DMARC1; p=quarantine; rua=mailto:dmarc@domain.com

✅Best Practices

  • ✓
    Implement SPF: Create an SPF record listing all authorized mail servers.
  • ✓
    Enable DKIM: Configure DKIM signatures for all outgoing emails.
  • ✓
    Set DMARC policy: Start with "p=none" for monitoring, then move to "p=quarantine" or "p=reject".
  • ✓
    Monitor regularly: Review DMARC reports and adjust your configuration.
  • ✓
    Check blacklist status: Regularly monitor if your domain is on any blacklists.

FAQ

What is SPF?

SPF (Sender Policy Framework) is an email authentication protocol that specifies which mail servers are authorized to send emails on behalf of your domain. It helps prevent email spoofing.

What is DKIM?

DKIM (DomainKeys Identified Mail) adds a digital signature to outgoing emails. This allows recipients to verify that the email actually came from your domain and hasn't been tampered with.

What is DMARC?

DMARC (Domain-based Message Authentication, Reporting and Conformance) builds on SPF and DKIM. It specifies how recipients should handle emails that fail authentication checks.

Why are MX records important?

MX (Mail Exchange) records specify which mail servers are responsible for receiving emails for your domain. Properly configured MX records are essential for email delivery.

What is an email blacklist check?

A blacklist check verifies if your domain or IP address is listed on known spam blacklists. Being listed can severely impact email deliverability.

How do I improve my email security?

Implement SPF, DKIM, and DMARC records, use strong DMARC policies (quarantine or reject), monitor your email reputation regularly, and keep your DNS records up to date.