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Email spoofing is the #1 cause of business email compromise and invoice fraud. Check if your domain is protected with our free email authentication tools.
Our free tools analyze your email authentication from the outside — just like an attacker would.
Verify your Sender Policy Framework record exists and correctly lists authorized mail servers.
Check if DomainKeys Identified Mail is configured for cryptographic email signing.
Validate your DMARC policy tells receiving servers how to handle unauthenticated email.
Identify gaps in your email authentication that could allow domain impersonation.
Understanding the threat helps you protect against it.
Email spoofing exploits a fundamental weakness in email protocols: SMTP does not verify the sender is who they claim to be. An attacker connects to any mail server and sends an email with From: ceo@yourdomain.com. Without SPF, DKIM, and DMARC, receiving servers have no way to know it is fake.
Three free DNS records prevent this: SPF lists authorized senders, DKIM adds cryptographic signatures, and DMARC tells receiving servers what to do when authentication fails.
The fix takes about 30 minutes and costs nothing. The alternative—a successful business email compromise—can cost your business tens of thousands of euros.
Erhalten Sie eine professionelle Website-Vertrauens- & Sicherheitsanalyse — ein klarer, umsetzbarer Bericht, auf den sich Ihr Unternehmen verlassen kann.