Bug in seting up User Email

Dear All,

I have been messing for now almost a week with the email setup on ERP Next. Deployed a production setup of Version 12. Created a new user other than the two default users created at the time of installation.

Every email i send to user email “user@domain.com” is also getting received in Administrator account as well, i have removed all role permissions to Administrator accept HR Manager but it is constantly showing up all emails received in communication as well as in Inbox.

Kindly advise