Amazon has several policies on what sellers can include in emails to buyers. It is important to comply with these policies in order to avoid suspension and give buyers an optimal experience.
What links can I include?
You may not include links to non-Amazon web pages, such as your own website or a third-party shopping site, and you may not include links to Amazon detail pages or storefront pages (see more here). Most importantly, you may not divert buyers to another site in order to purchase something. Amazon reserves the right to remove any links that are considered untrusted.
Can I include my logo?
You may include your logo in emails as long as it does not contain a link or URL to your website or any non-Amazon website.
Can I include my email address?
You should not include your direct email address in buyer-seller messages. Amazon provides an email alias to each buyer and seller for privacy and security and to make sure that all buyer-seller communications go through the Amazon system. Amazon reserves the right to delete email addresses from messages.
Instead of including your email address, you can encourage buyers to reply to the email you send them (which will create a new message to you in Seller Central) or to contact you via your store contact page (using the shortcut tag [[ContactUs]]).
Can I let buyers know about another product or a promotion?
You may not send any promotional or marketing material to your buyers. Any unsolicited messages to buyers should be necessary for the current order and related customer service.
Can I request seller feedback?
You may send the buyer a polite request for feedback in order to improve your feedback rating.
Can I ask a buyer to change or remove seller feedback?
You may send a buyer a polite request to remove inaccurate feedback.
Can I request product reviews?
You may request product reviews in a neutral manner, but you may not ask for positive reviews or ask for reviews only from buyers who had a positive experience.
For example, you may say, "Will you please leave a product review?" but you may not say "Will you please leave a 5-star review?" or "If you liked the product, please leave a review."
Also, you may not send product review requests only to buyers who left positive seller feedback.
Can I ask a buyer to change or remove a product review?
You may not ask buyers to change or remove a product review.