first, we verify your phone number by sending you a 4 digit confirmation code. Anyone with your phone number on their phone contacts will be able to exchange loopy with you. WhatsApp also works this way.
I meant to say that I am not using any third party mail service api for sending mails. and yes you are right that I am hosting it in linode which is a cloud hosting service provider. But I have tried to put multiple filters inbuilt into this service to make sure that chances of arising above mentioned situation is low.
you can always unsubscribe from this service if you want. Also there are some multiple filters inbuilt into the service restricting you to send multiple mails to the same id.(hourly freq limit, daily freq limit etc.)
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