[NA HW3] Null Sender

[賴邑城]

助教您好，我目前block null sender的作法是在postfix的main.cf 中的smtpd_sender_restrictions加入check_sender_access hash:/etc/postfix/sender-check，我自己測試null sender是會被reject的，但在judge中得到回覆卻是
This check point is "check_null_sender"
Trying to send mail with null sender
Host did not advertise authentication
Your server failed to reject null sender. Last responses:
QUIT
221 2.0.0 Bye
Connection closed with remote host.
，請問是我對實際上的測試內容有甚麼誤解嗎？