550 5.1.8 Access denied, bad outbound sender
A Non-Delivery Report (NDR), also referred to as a ‘bounce report’, with the status code: “550 5.1.8 Access denied, bad outbound sender” is typically generated by Microsoft if one.
A Non-Delivery Report (NDR), also referred to as a ‘bounce report’, with the status code: “550 5.1.8 Access denied, bad outbound sender” is typically generated by Microsoft if one.