Nice mod but I have a better idea inspired from Facebook .. they periodically check if the email address still exist or not .. if it doesn't exist they prompt user to update email

there are some classes that can be used for that
http://www.phpclasses.org/package/66...sing-SMTP.html
https://github.com/hbattat/verifyEmail
https://github.com/DukeOfMarshall/PH...on/tree/master