Проверка почтового сервера на open relay

telnet 192.168.150.110 25

220 ESMTP
helo qw
250 mail.domain.local Hello qw [192.168.150.110]
mail from: <qw@qw.kz>
250 OK
rcpt to: <as@as.kz>
550 relay not permitted
quit
221 mail.domain.local closing connection
Connection closed by foreign host.