Mailchimp requires a specific format in order to import the emails exported from your Best of ballot.
First you will need to follow these steps: How to export your email list from Best of for your email blast platform
Here is the specific format that Mailchimp needs:
*Mailchimp also does not want spaces between entries. It needs to look like this:
To get this format you will need to edit the CSV in your computer's downloads folder.
Here are those steps: