I know MailChimp has an article on how to do this in a managed/safe way: http://kb.mailchimp.com/article/how-can-i-remove-someone-from-my-list-who-has-never-ope

I know MailChimp has an article on how to do this in a managed/safe way: http://kb.mailchimp.com/article/how-can-i-remove-someone-from-my-list-who-has-never-opened-a-campaign http://kb.mailchimp.com/article/how-can-i-remove-someone-fro...