Free online email security checker. One-click check SPF, DKIM, DMARC, and BIMI records for any domain. Prevent email spoofing and phishing, improve email deliverability.
1. Input: Enter or upload your content.
2. Process: Click the action button to process.
3. Get Results: View, copy, or download results.
SPF (Sender Policy Framework) is a DNS TXT record specifying which mail servers can send email from your domain. Receiving servers check SPF to verify sender identity and prevent spoofing.
DKIM (DomainKeys Identified Mail) adds digital signatures to prove emails haven't been tampered with. DMARC (Domain-based Message Authentication) builds on SPF and DKIM, telling receivers how to handle unauthenticated emails (reject/quarantine/none).
Enter your domain and click Check. The tool queries DNS for SPF, DKIM, DMARC, and BIMI records, evaluates your email security posture, and provides improvement suggestions.
Without SPF/DKIM/DMARC, your domain is vulnerable to email spoofing. Since 2024, Gmail and Yahoo require SPF and DKIM for domains sending >5000 emails/day, or emails may be rejected or marked as spam.