To migrate your existing subscribers from another newsletter service to Hashnode, you will need a .csv file containing your subscriber emails.
1. First, go to the "Import" tab in your Hashnode Newsletter dashboard, as shown in the screenshot.
2. Then, check the confirmation box and click the "Import CSV" button. Select the .csv file with your subscriber emails from your system file dialogue. Allow the import process to complete.
You'll receive a notification once the import is finished, as shown in the screenshot.
Things to note:
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The maximum file size allowed is 10 MB
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Duplicates/Invalid email addresses will be ignored
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Make sure your CSV file has 1 column that contains all the emails