postfix的smtp认证有问题？

coldcoffee

我在main.cf中加入以下设置：

smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = ''
smtpd_recipient_restrictions = permit_sasl_authenticated, reject_unauth_destination, permit_mynetworks,
broken_sasl_auth_clients = yes
smtpd_client_restrictions = permit_sasl_authenticated
smtpd_sasl_security_options = noanonymous

从启postfix服务后，客户端无论是用outlook还是fixmail，不选“SMPT认证”还是可以发信。不知道是为什么？