It is possible, altho my idea may not be as direct a connection as
you'd like.

Outlook PST files are essentially large database files. Each email is
a record, and within that record are fields that contain the data: To,
From, Subject, Date Sent, Date Received, etc. You could use MS Access
to link to the PST file and extract the Subject format, then export
that to Excel. Once it is set up it can be done quickly.

Would something like that be do-able for you?

DaveO
Eschew obfuscation