How to Open Outlook PST and OST Files Without Outlook

说明与用途

用户可以在不使用 Outlook 的情况下打开 PST/OST 文件，使用 libpff、readpst、Thunderbird 或客户端浏览器查看器，保持数据控制。

问题

Need to read PST/OST files without having Outlook installed, especially on Linux or macOS.

结果

Users can access PST/OST files locally on Linux/macOS using open‑source tools, preserving privacy and enabling long‑term archival or forensic analysis.

工作流

• Identify file type and format with pffinfo or by extension and size.
• Make a copy of the file before processing.
• Decide whether data can be uploaded or must stay local.
• Choose a tool: - Outlook if available and same profile. - libpff/pffexport for forensic extraction. - readpst to convert to MBOX/EML for Thunderbird. - Client‑side browser viewer (e.g., Mailward) for quick local viewing. - Upload‑based converters only if privacy is not a concern. - Verify results by comparing folder counts and spot‑checking messages. - Clean up exported data securely after use.

证据

Sooner or later someone hands you a .pst file. Maybe it's an old mailbox export from a former employee, an archive from a laptop you retired years ago, or evidence you need to review.

来源

libpff by Joachim Metz is a forensic‑grade library for PST, OST, and PAB files. It ships with command‑line tools: pffinfo shows file metadata; pffexport extracts the contents into a directory tree.

来源

readpst comes from the libpst project. Its main advantage is that it converts to standard formats that ordinary mail clients understand.

来源

Mailward parses PST/OST files locally in a Web Worker with no upload, handles multi‑GB files, and shows the folder tree, message bodies, and attachments, with full‑text search.

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