Why money not transferred through Paypal MassApi while getting success in response

I have used https://github.com/paypal/merchant-sdk-php

//Paypal Mass Pay integration            $massPayRequest = new MassPayRequestType();            $massPayRequest->MassPayItem = array();            $masspayItem = new MassPayRequestItemType();            $masspayItem->Amount = new BasicAmountType(PAYPAL_CURRENCY, $input['amount']);            $masspayItem->ReceiverEmail = $input['email'];              $massPayRequest->MassPayItem[] = $masspayItem;            $massPayReq = new MassPayReq();            $massPayReq->MassPayRequest = $massPayRequest;            $paypalService = new PayPalAPIInterfaceServiceService();            $massPayResponse = $paypalService->MassPay($massPayReq); // Call paypal mass pay

It works for me it requires user amount, currency and email to whom you need to transfer amount.

If you created sandbox account with abc@gmail.com then paypal create account with new email e.g abc-facilatator@gmail.com you need to check with new email id. Paypal will transfer amount to that email id in case of sandbox

On live if receiver paypal account is not available with the specified email. Then also paypal transfer amount to that email.for access that amount user need to create account with that email id.