Yahoo has been removing contacts from Yahoo Mail users' contacts lists without permission from these users. The company has apparently taken upon itself to edit a user's contact list and remove old email addresses. Yahoo Customer Care explained to one user in this email, "Yahoo! wants to make sure your address book is filled with the most current and valid emails to those family, friends and contacts you need to reach. We noticed that you had emails in your address book that are no longer valid, so we have removed them."