We have an App that has users from all over the world. I collect their emails if they choose to receive our Freebies in the App. Unfortunately, this puts us under the EU GDPR. How do I keep my MaxBulk user emails safe using the MLM? It has been recommended that we no longer store our customer's email on the internet. The whole purpose of using MLM is to see who is opening our emails. Do you have a list of recommendations and settings to keep us all compliant when using the MaxBulk Mailer and MLM?