改變kindle的email和核准可以寄檔案的email

很難找到修改的地方，但請不要被amazon超級繁複的介面氣死了。

https://www.amazon.com/gp/help/customer/display.html/ref=help_search_1-2?ie=UTF8&nodeId=200767340&qid=1442400207&sr=1-2

Modify Your Send-to-Kindle E-mail Address

You can modify your Send-to-Kindle e-mail address at any time.

To modify your Send-to-Kindle e-mail address:

    Go to Manage Your Content and Devices.
    From Settings, scroll down to Personal Document Settings.
    Under Send-to-Kindle E-mail Settings, click Edit next to your Fire tablet, Kindle device, or Kindle reading app.
    Enter a new e-mail address, and then click Save to save your changes.

Your Approved Personal Document E-mail List

You can only receive documents from e-mail addresses you have approved.

To add an approved e-mail address:

    Go to Manage Your Content and Devices.
    From Settings, scroll down to Personal Document Settings.
    Under Approved Personal Document List, check if your e-mail address is listed. If your e-mail address is not listed, select Add a new approved e-mail address.
    Enter the desired e-mail address and click Add Address.
    Tip: To remove an approved e-mail address, select Delete next to the address you wish to remove