100% free · no signup required

free dns & email
security tools

Check DNS records, validate email authentication, and diagnose deliverability issues. All tools run directly in your browser.

MX Lookup

Look up mail exchange (MX) records for any domain. See which mail servers handle email delivery and their priority order.

Validate SPF (Sender Policy Framework) records. Parse and analyze which servers are authorized to send email for a domain.

Check DMARC (Domain-based Message Authentication) policies. Analyze authentication settings and reporting configurations.