Thank you for reaching out to us through the Community. You are able to keep your contacts as long as they have an express permission status. This is independent of whether they opted in through the GDPR email that was sent out through your account or before it. As for the source of certain contacts, you may have been given the option to choose whether the contacts you were adding were implied or expressed permission when you were uploading them manually to your account. Any contacts that are under the expressed permission status are eligible to be sent email under GDPR regulation. I hope this helps. Let us know if you need assistance with anything else.
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