Email Header Analyzer

The Email Header Analyzer processes raw email header data to extract signals related to deliverability, authentication, and routing. It supports RFC-based header fields (From, Received, SPF, DKIM, DMARC, Authentication-Results) and outputs a structured profile that can be consumed by APIs or dashboards. Target users include deliverability engineers, IT admins, marketing tech teams, and developers integrating header checks into CI/CD pipelines. Use cases include post-bounce analysis, domain changes, or ongoing sender reputation monitoring. The tool does not analyze message bodies; it focuses on provenance and trust signals. The outputs help identify misconfigurations, misaligned domains, or suspicious routing paths.

How it works conceptually: the tool parses headers to normalize values, then applies RFC-based rules to assess SPF alignment, DKIM pass/fail, and DMARC disposition. It builds a hop-by-hop routing map from Received lines, resolves domains to MX paths, and flags anomalies such as SPF leaks or duplicate DKIM signatures. A deliverability score blends objective signals with heuristic risk factors and is suitable for API-driven automation. Outputs include a summary, a detailed authentications object, a routing array, and actionable recommendations. The design emphasizes deterministic parsing, robust error handling, and clear data quality indicators.

Unique value and features: repeatable checks, exportable results, and API-friendly data structures integrate into monitoring tooling and incident reports. Supports RFC compliance, timestamp normalization, and clear data quality indicators, ensuring consistent interpretation across teams. Examples include post-bounce triage, domain mergers, and campaign-wide header consistency checks.