I am trying to find out how to quickly remove do not mail names from our mailing lists. We have several lists and our do not mail list is huge(280) so it's getting very time consuming to clean the lists. I'm assuming I can copy the do not mail list names to the current mailing list and then remove duplicates..but I want to remove both duplicates when i do that. My understanding of the remove duplicates feature and unique values is already a bit foggy. If someone could give me a step by step process on how to do this it'd be greatly appreciated. It's way too time consuming to search for each name from the do not mail list :p