Viralstyle Fulfillment will update Shopify with the orders status, then Shopify will send the email from your store to notify (appears as though you've sent it out). Viralstyle Fulfillment will never send notifications to your customers directly. These settings can be adjusted in your Shopify account. See the two articles below:
These 3 notifications are:
1.) When the order is confirmed & has reached the Viralstyle Fulfillment queue.
2.) When the tracking number is added to the Shopify Order Timeline, the customer will receive an email with tracking info.
3.) when the package is delivered to its destination, the customer will receive an email stating the package is “Delivered”.