You can run regular expression searches in Word that will select all email addresses, so you can copy them out, or re-format them to all be lowercase, boldfaced, and so forth.
Bring up the Find tool and check off the 'Use wildcards' option in the 'More' section. Then enter this regular expression search:
. . . and click Find In . . . Main document. Each email address will be selected.
You can modify the Regex search to find emails which include a period in the name before the domain: