If you lost your email address on Yahoo from lack of use, don’t worry. All you need to do is trust that the new person controlling your old email address will click the “Not My Email” button and not read messages meant for you.
Yahoo will begin offering a new ‘Not My Email’ button this week that gives owners of newly claimed, previously dormant, user names the ability to ‘return’ messages that were not meant for them. This is part of Yahoo’s ongoing efforts to mitigate any potential harm that may come from its recent ‘user name recycle program‘.