SPAM Filter Triggering Unsubscribe
Has anyone experienced their ESPs SPAM filter automatically triggering an unsubscribe on a new responsive email design?
What would all of a sudden trigger this. MailChimp has a great article on how to avoid Spam: http://mailchimp.com/resources/guides/how-to-avoid-spam-filters/html/
This is an existing list that we have been sending to.