To buy postage stamps online, all you need is a printer, approved postage labels and a subscription to a PC Postage service such as Stamps.com.
Stamps.com, the leader in online postage with over 736,000 customers, offers the ability to buy and print postage stamps using special labels called NetStamps. These adhesive labels can be used to send any class of mail for domestic or international letters. Postage for NetStamps can be printed using a regular inkjet or laser printer.
If specifying the postage value:
If calculating the amount of postage: