How can I export customer details of those who have opted in for email marketing?
You can generate this information through a custom report:
- Go to Reports > + Create Custom Report
- Select Customers
- Include "Opted out of receiving emails" along with other information relevant to your preferences.
Run Report and use the filter near the top to sort based on the information you’re looking for.
Alternatively, download it; within a spreadsheet application (Microsoft Excel / Google Sheets), filter that column based on those who have opted in for marketing emails.