We need you confirm your acknowledged upon receiving PO and plus confirm delivery date by-email as well.
If you don't reply I will never know have you got this e-mail or not that means you may lose PO.
You are allowed to deliver before due date is indicated in PO.
Please always indicate the PO number on your invoices for payment purpose.
If you have any questions, or if I can be of any further assistance, please do not hesitate to contact me