Amazon Employed to provide the email address of your customers, therefore you might follow up with them and mail them thank you notes and such, although they've transformed that a while ago. Continue reading to find out the way you are able to still connect with your customers.
They might have released The Wholesale Formula (www.rentonreporter.com) restrictions to the communication system of theirs in order to keep a tighter reign on customer service quality, and maybe to prevent leakage of the profits of theirs. In either case, now there's no longer a method to get in touch with your customers directly.
Or is there? In reality, there are 2 ways:

1) Thank You Notes or gifts
You could have some type of "special" of gift in the deal of yours, maybe a bookmark which doubles as a coupon, or perhaps a present of some type, for instance for an electronic book. If you go with the latter, you might want to offer them a choice -- or even make quite certain you have a selection of offers and send them one that would go perfectly with their purchase.
In order to claim it, they would then have to email you, and bingo -- you will have the email address of theirs.
if all that you want is follow up, there is absolutely nothing wrong with writing back, thanking them for their good comments (saying they made your day!), as well as asking them if they would perhaps be prepared to provide you with constructive responses and include identical comments.

I at one time received an enthusiastic call from somebody who explained she was really pumped up about having gotten the book, and so quickly and in such high quality, and that she will leave feedback. Nevertheless, sadly, she never ever did.