Force members to update email address on file..?

[KevNJ]

Is there a mod/hack/etc that will make users update and validate their email address thats "on file".

So when they login or the next time they visit the site they are forced to confirm the email address they have registered with the site, where it then sends a confirmation email to that address where they have to click the link to validate it before they can do anything else on the site.

Have alot of users that no longer have current email addresses assocciated with their usernames.

Thanks in advance.