You do not need to specify a subject for the e-mail.A detailed tracking response for all numbers will be returned to your e-mail address.If you do not have this, then you will not be able to track your package.
It is the service that the United States Postal Service offers to its customers, where they have an opportunity to track their packages themselves.
Since the time USPS has started providing this service, USPS tracking service has become a favourite of many. As we already know now what is the USPS tracking, another thing to know is that USPS assigns a number with almost all the packages shipped by the customer.
Tracking is one of the most preferred services by the people of the United States.
This service is best suited for the people who always want to remain updated about their parcel.
Though if a customer wishes to use the tracking service on the Commercial Standard Mail parcels, he can do so by bearing an extra cost.