Order notification emails and the Manage Orders page in Seller Central display customers' anonymized email addresses. Order reports include both anonymized email addresses and phone numbers. For more information on how to download your order reports, see the Order Reports Help topic.
For the privacy and security of seller-to-buyer communication and vice versa, the e-mail addresses of both parties are masked. The buyer e-mail address that you see is an encrypted e-mail address. Sellers can communicate with the buyer via email addresses encrypted by Amazon using the Contact Buyer form.
You could also contact the buyer by telephone. The contact information you need can be retrieved from the order reports. For more information on how to download your order reports, please refer to the How to Generate and Download an Orders Report help topic.