I only sent an email to one list initially, now I realize it wasn't my most updated list and want to send it out again. I assume in this situation, the person would get it a second time, right? But what I'd really like to know is how to merge lists. Both lists are from my customer data base and there's a lot of overlap. But I do regularly add and subtract from the source data, so I want to keep all the "subtracted" people on the Constant Contact list, but still ADD my new contacts.
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