Amazon might have a part in delivering all kinds of stuff to your door soon, as its massive shipping network opens up to other companies outside its marketplace, more directly competing with giants like DHL, UPS, and FedEx. The new Amazon Supply Chain Services (ASCS) will offer freight, distribution, fulfillment, and parcel shipping to businesses “of all types and sizes,” including Protcor & Gamble, 3M, Lands’ End, and American Eagle Outfitters.

With ASCS, Amazon is betting that other companies will pay to use its sprawling fulfillment network — much like they pay to use its web infrastructure, which the ecommerce giant started offering to third-party businesses in 2006. Amazon has spent years building up a fulfillment network for its own deliveries, further decreasing its reliance on the US Postal Service , FedEx, and UPS.…