MediaWiki:Notification-header-unsubscribe-bouncehandler/qqq

Flyout message of Echo notification to notify the user of his/her invalid email address. Parameters:
 * $1 can't be used (there is no agent).
 * $2 can't be used (there is no agent).
 * $3 is the unsubscribed email address of the user.
 * $4 is the username of the user whose email address was unsubscribed. Can be used for GENDER.