What is message fingerprinting analysis?

Message fingerprinting creates unique identifiers based on content characteristics: structure, links, text patterns, and rendering elements. Fingerprints enable tracking specific message performance across recipients and over time.

Uses include: identifying which template versions perform better, detecting when content changes affect delivery, tracking A/B test variants, and correlating specific content elements with engagement or filtering outcomes.

Advanced application: comparing your fingerprints against known spam fingerprints helps identify why content might trigger filters. If your message resembles patterns associated with spam, fingerprint analysis reveals the similarity.