...email addresses are in the "From" line, which are in the "To" line, and which are in the "CC" line)
So far, I have this:
(?i)(from:|to:|cc:).*([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})
The email pattern was written by...