large email list to import

Occasional Participant

large email list to import

Super quick question: I've downloaded contacts who've chosen digital invoicing from our billing software, and want to upload to Constant Contact. Most will already be present (or may have chosen to unsubscribe). I noticed some of the same emails listed multiple times and I believe this is because the info we pulled listed the same email for every machine leased from us. So if I upload those contacts, they will all be only imported once, correct? I won't run the risk of sending some poor soul the same email ten times—I'm like 99% sure it won't but want to be sure! Thanks!


Hey @BrendaC084,


Thank you for reaching out to us! That is a great question. You are correct, our system will filter out any duplicates that you attempt to import. Even if you have a customer on multiple lists, it will only send them the email one time. Please let us know if you have any other questions! 


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