The python script should read in one file (Email_Original.txt) and read in a set of terms (Terms.txt) that will be used to search/replace in the Email_Original file. The Terms.txt file will have a delimiter of ":" to separate the terms.
Read in both files and do a simple case-insensitive search and replace. Then output a new file with all the search terms replaced as file exactly like (Email_Fixed.txt)
See Email_Original.txt and Email_Fixed.txt to know how the process should look when completed.
I want to be able to edit the python file, and learn a bit at the same time, so please be verbose in your python in-line comments.
If you have any questions, please feel free to clarify with me.