Which is really a pity.   When I search my mailbox for something I ordered, I'd like to find it.  I should not have to remember where I ordered it and go to every store website.  I tried to bring this up with Amazon customer service with entertaining results:
  You are now connected to Pooja from Amazon.com
Me: How can I enable itemized order information in order confirmation emails?  I understand that I can view it on your site, I am specifically asking about emails. 
Pooja: Hello, my name is Pooja.  I'm here to help you today. 
Pooja: To be able to pull up your account please provide me your name, e-mail address and the billing address. 
Me: My question is not account-specific 
Pooja: May I please place you on hold for 2 minutes while I look in to this for you? 
Pooja: I'm sorry but you'll not be bale to view the order details unless it is directed from the website. 
Me: So when I order 10 items from Amazon I cannot have an email listing them? 
Pooja: You'll receive an email confirmation for the items once you've completed the order/ 
Me: This email only lists the first one or two, followed by "... and 8 more items".  
Pooja: In the email if you'd click on the link you'd be directed to the site for full item details. 
Me: Can I have an email listing all the items? 
Pooja: Would you like me to send you one ? 
Me: I'd like you to send me one every time I place an order 
Pooja: I'm sorry but that is not possible.