I&#x27;m all for splitting a task into more manageable pieces where convenient:<p>1. readpst will convert your PST into a mbox-compatible structure<p>2a. there&#x27;s plenty of tools to search <i>that</i> (e.g. Mozilla Thunderbird)<p>2b. in the past, I&#x27;ve used &quot;readpst -M&quot; to just generate a set of files, and then &quot;grep -HIrn&quot; to search for a string, no further tools needed; you may want to look at more sophisticated approaches.<p>This has the advantage that all processing is local, and you&#x27;re not exposing your data to some hopefully-benevolent cloud entity.