Hi. I have two emails lists that I want to send similar emails (the difference being some customized messaging). As some recipients are on both lists, I wouldn't want them to receive both emails.    Before sending an email, is it possible to cross-reference the lists within Constant Contact to prevent those on both lists from receiving both emails, or is this something I need to do manually outside of Constant Contact? Unfortunately, the emails on both lists aren't tagged so I can't filter them out. Any suggestions? ... View more