1. Export the subscribers and include the email address field and all required fields.
2. Add a column named Status to your import file. Populate this field with the word Unsubscribed or Active for each subscriber.
3. Import the file to your All subscribers list.
4. Select an update option.
5. Map the email address field, status field, and all required fields.
6. Complete the import process.
7. Ensure that subscribers imported as unsubscribed have been unsubscribed appropriately. Set subscribers imported with an active status to active on each list that they have requested to be re-subscribed to.WarningSubscribers in an undeliverable status previously bounced an email sent from your account. Changing subscribers from undeliverable to active can result in high bounce counts in future sends.Subscribers in an unsubscribed status previously unsubscribed from emails sent from your account. Changing subscribers from unsubscribed to active can result in high spam complaints in future sends.