SPF DKIM Validator

SPF DKIM Validator analyzes a domain's DNS records to verify SPF and DKIM configurations for email authentication. It accepts multiple inputs (domain, SPF text, DKIM selector and domain) and performs syntactic checks, record existence, and alignment checks against best practices.
Conceptually, the tool resolves TXT records for SPF and DKIM, parses mechanisms and modifiers, and flags common issues such as multiple SPF records, missing -all or ~all qualifiers, and selector misconfigurations. It reports actionable recommendations and suggested corrections.
Intended users include mail admins, security engineers, and DevOps teams responsible for outbound mail. Use cases include validating a new domain's SPF before deployment, auditing DKIM keys after key rotation, and diagnosing deliverability problems related to authentication failures. The tool emphasizes deterministic outputs and precise diagnostics.
Core value comes from combining multi-field input capture with DNS resolution and rule-based interpretation. It helps reduce manual DNS lookups, prevents spoofing, and accelerates remediation by providing structured outputs, validation status, and concrete next steps.