DuckIntel / Security Tools
Generate and validate SPF, DKIM, and DMARC DNS records with policy warnings about lookup limits and alignment issues.
Generate and validate SPF, DKIM, and DMARC DNS records with policy warnings about lookup limits and alignment issues.
Build SPF, DKIM, and DMARC DNS records with instant validation. Warns on SPF lookup limits, weak algorithms, unsafe DMARC policies, and missing report addresses.
Email Auth Builder is part of DuckIntel, a free browser-based cyber intelligence platform with 59 security tools for SOC analysts, IT administrators, and security professionals. No login or account is required. All tools run entirely in your browser — your data never leaves your machine.
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Part of DuckIntel.io — 59 free browser-based security tools for SOC analysts. No login. No tracking. 100% client-side.