So I have an aweber list with 15,000 people, only problem is that aweber charges me $130 / month to have all these emails. Despite having all these leads, I have never cleaned out my list from people who don't click or open, I just delete unsubs. In an effort to drop below 10000 leads and pay only $50 I want to clean my list? or if you have any suggestion on how to manage a list with all these emails please let me know ? What is a general rule of thumb for cleaning a list?