What does this message imply if someone is trying to send to this recipent
This is what the sender is getting
You do not have permission to send to this recipient. For assistance, contact your system administrator. <mail.sender.com #5.7.1 smtp;550 5.7.1 Requested action not taken: message refused>
does it mean that the recipient has a permission set for the sender cant send to them
or
does it mean that the sender has something set on their end which is causing them to not send to
yourname@domain.com