Computer program to extract addresses and emails from .txt files.

I have a .txt file (there will be 450 in total) and each file contains 100 notices of contracts, so 45,000 contract notices. There are a range of sections common to each notice. I need to run the 450 files through a program to extract as a minimum the emails in one of the sections. It would also be good to be able to extract the postal addresses and business names as well. I need to have the data in an Excel format for mailshots etc.