Please follow the steps below to update your 'from' email address.
1. Login to your account and click on Settings
2. Click on to the 'Company Profile' section
3. Enter your custom ’from' email address under Receipt Settings
4. Enter the email address you wish to use and click Verify Email
5. After you click Verify you will receive a verification email from
no-reply-aws@amazon.com. Click the link in the verification email to activate your new 'from' email address