Nothing is forever, especially not your lists. They’re unstable collections of entries which become updated and outdated all the time. As time goes by you can loose even 30% of them* due to normal attrition. This can significantly impact your delivery and reputation. However, you don’t have to sit and watch as your stats slowly go down. There are many standard procedures that can be applied on a daily basis to minimize the effects of list fatigue and help maintain its high quality.
