If you're one of those unfortunate people who didn't manually export your local OST to a PST volume (more archive-friendly, less password-focused), you might be out of luck to look back through old mail. In my case, I had an old position with years worth of email inside an OST file.
There's a lot more here than alternatives in the OST Data Recovery category. I was able to pull up some old files by keyword and look at their attachments from an old mail archive.
Steps: Download the installer, run Uniextract2 on it, and then launch Kernel OST Viewer.exe. You can also download, install, copy to a folder of your choice, uninstall, launch. In the latter case, it will open up a web browser to the home page.
Status: Portable. Stealth: No, writes a few incidental settings to HKCU\SOFTWARE\Kernel for Ost to PST VIEWER12p\Kernel for Outlook PST Repair\
Status: Liteware - https://www.nucleustechnologies.com/dow ... viewer.php
Websites
https://www.nucleustechnologies.com/dow ... viewer.php
https://www.softpedia.com/get/Internet/ ... ewer.shtml
Screenshot