How to get "to" and "subject" from outlook?

Question

Email

There is a database (~ 10GB) of a company that has been in correspondence with clients over the past 5 years. This year, the idea arose to remember all the old clients, for this you need to pull out the "to" and "subject" fields of the letter from this database. It takes a very long time to do this manually.
any ideas how to implement?

Answer 1

Write a small program to parse eml files in which letters are stored. 1 letter - 1 file, tags are English, text and values ​​are unicode as a rule, although another encoding may be koi8 or win1251 . Maybe there is some software, but I would try it myself.