Create, check, and edit a mailing list based on search of old emails - repost

This job is a relatively simple clerical task suited for somebody who is familiar with web based email, able to troubleshoot problems of data entry, and willing to do the careful work of wrangling email addresses and setting up a mass mailing. Details: As a result of a domain name sale, an email account I host for a friend is about to become dysfunctional. The email account has been used as a forward-only email, forwarding all messages to a yahoo mail account. The job here is to extract the emails from the Yahoo mail archive of this user that have been addressed to this specific address and put them into a spreadsheet (Excel, Numbers, or Google spreadsheet), so that I can do a mass mailing to them announcing the email address change.