Python Tutorial: Build a DMARC Report Parser and Terminal Dashboard

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A developer tutorial published on DEV Community demonstrates how to build a DMARC aggregate report parser and terminal dashboard using only Python's standard library. DMARC reports arrive daily as gzip or ZIP-compressed XML attachments and reveal which sources are sending email on behalf of a domain, along with authentication pass/fail rates. The guide explains that most teams configure DMARC once and rarely revisit it, leaving potential spoofing activity undetected. The Python implementation handles multiple archive formats used by providers such as Google, Microsoft, and Yahoo, parsing key fields including source IP, message count, SPF result, DKIM result, and disposition. An aggregation function is also included to consolidate multiple daily reports into a unified pass/fail summary across sending sources.

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