Dovecot Mailbox Viewer v0.4.1

Download Dovecot-Mailbox-Viewer-Windows.exe below and double-click it. No installer, ZIP extraction, Python installation or separate _internal folder is needed. For Windows 10/11 (64-bit). Startup can take a few seconds while bundled files unpack automatically. Your original backup stays unchanged.

Fixed

• Open uncompressed Dovecot mdbox messages without a manual decompression bypass.
  The N record type means normal message, not gzip-compressed message. Detect
  gzip from each payload so mixed compressed/uncompressed storage also works.
• Keep gzip validation and decompression size limits, with source-specific errors
  for corrupt, truncated or oversized messages.

Added

• Community-tested Debian 13 installation instructions using system PySide6 packages.
• Synthetic regressions for mixed-compression storage in folders and .tar.gz
  backups, byte-preserving MIME handling and invalid gzip streams. The packaged
  Windows check now imports, searches and exports both message formats.
• Embedded licence viewer under Help, exact dependency versions, third-party
  notices and matching Qt/PySide library source downloads alongside the EXE.

Known limitations

• Debian 13 instructions are community-tested; the automated packaged build
  remains Windows-only. The forum member's actual mailbox has not been supplied
  for validation. Other message compression codecs remain unsupported.

SHA256SUMS.txt contains checksums for all release assets. Only the EXE is needed to run the app.

Third-party software: Qt and PySide/Shiboken are used under LGPLv3. Third-party-notices.zip contains licence texts, exact dependency versions and rebuild instructions; these notices are also available inside the app under Help → Licences and third-party software. The matching, unmodified Qt and PySide/Shiboken source archives are the separate *-src-*.tar.xz downloads below. Bundled-files.txt lists native files. You may modify/rebuild these libraries and run the app with your replacements. GitHub's Source code downloads contain the MIT-licensed application source.