DRAWBACK
Drawback is available on goods exported by the Post. The goods should be eligible for drawback purpose. It should figure in Drawback schedule, market price of goods in India should be more than Drawback claim and you should receive foreign remittance from your buyer.
You can claim drawback immediate after your export but if you do not receive your foreign remittance within six months then you have to return the Drawback amount with interest. You may face adjudication and prosecution proceedings if you have exported any thing with the fraudulent intention or violation of any law.
Special Economic Zone (SEZ)
The new engine of Indian growth, The SEZ units , can export/import all products through post parcel/courier