Hi, I did a little searching and turned up one thread from back in 2012, wasn't sure whether that was still applicable or not, but basically, I'm wanting to import a couple address books, but I need to build some sort of a blacklist or manual unsubscribe list as there is some overlap from each one of these imports that I do not want to include on the mailings. I understand the best thing to do is to delete them, but then in another few months when I want to re-import the address book as an update, I have to go through and delete all those same addresses again. That would be a pretty painful process.
Any ideas/suggestions?