Mailbox Archive Statistics Analyzer

Mailbox Archive Statistics Analyzer is a desktop email archive statistics and traffic
analytics workbench for standard Unix mbox files, Maildir directories, and standalone
RFC 5322 .eml message collections on Linux.
A lightweight Linux alternative to desktop mailbox statistics utilities such as
OutlookStatView, it parses standard message headers locally without modifying your mail
archives and computes detailed correspondent, domain, schedule, and thread metrics.

Key Features:
- Multi-Format Mail Archive Support: Reads standard Unix mbox archives, Maildir
folders (cur/new), and directories of standalone .eml messages using Python's
native RFC 5322 and RFC 2047 header parsers.
- Correspondent Traffic Rankings: Ranks contacts by sent count, direct recipient (To)
count, carbon-copy (Cc) count, total message byte volume, attachment count,
attachment payload volume, and first/last activity timestamps.
- 24h x 7d Activity Matrix & Domain Breakdown: Renders a visual 7-day by 24-hour
message activity heatmap alongside domain-level traffic shares and byte volumes.
- Conversation Thread Depth Explorer: Reconstructs reply chains from Message-ID,
In-Reply-To, and References headers to measure thread depth, participant counts,
and active duration spans, with full CSV and JSON report export.

Disclaimer: This project is an independent open-source tool and is not affiliated with, sponsored by, or endorsed by NirSoft or Microsoft Corporation.