I want to email to List A & List B not exclude anyone on List C. This should be a very easy operation but I can't find a way to do it within Constant Contact. I read few solutions but nothing of them seem to work?! I also saw something about using TAG but I can't find a way to do that?! Is it because I have more than 10K contacts? What ways I can achieve this? I tried TAG, SEGMENT ....etc.
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