Hello @Seller_no4BCWCPkmovh

Thank you for your question here and asking the forums before reaching out to the other seller.

There is information about this in the Buyer-Seller Messages FAQ page.

As a seller, can I contact other sellers?

No. As a seller, you must not contact another seller using the "Ask a question" feature on the seller’s storefront page. If you have to report copyright, trademark, or patent infringement, see the Report Infringement page.

How do I report a message from buyer?

To report a message, click the Report Message on your Buyer-Seller Messages page, the seller App, or the email you receive. Then select the appropriate reason for reporting and click the Report Message that is displayed at the bottom of the message to submit the report.

Use the Report Message to report any suspicious activity to Amazon, such as messages you think are spam. While we cannot investigate every reported message, we analyze this data to identify patterns of suspicious activity and prevent such abuse in future. Once a message is reported, you are not required to respond to the message or mark it as No response needed. There is no need to remove a reported message from your inbox.

How do buyers distinguish between messages sent by sellers from other email sent by Amazon?

Your messages to a buyer will have your business name in the From field instead of displaying Amazon in a buyer’s email inbox. Once the buyer opens your message, we state your business name in the message’s body text.

I hope this helps!

Sandy