Some users may end up with non-existant emails over time due to deleting an email address but not updating a new one in the system, or entering a fake email into the system after registration.  When notifications are sent to these non-existant emails it's a waste of resources, annoying accumulation of bouncebacks, and may contribute to a site being labeled as spam.

This plugin provides a widget for the admin page where an admin can enter in email addresses for notifications which have bounced.  Each user with a specified invalid email will have all email notifications disabled (site, personal, group, comment_tracker).  They will be notified via site message if the messages plugin is enabled, and notified by system message on their next visit.

Produced for and with the support of Athabasca University, Canada.