解决方法
仔细看看
basic access controls可以帮助你;只需在
smtpd_recipient_restrictions中指定拒绝访问这些域的相应访问映射：
smtpd_recipient_restrictions = check_recipient_access hash:/etc/postfix/blacklisted_domains,permit_mynetworks,reject_unauth_destination,permit
并在/ etc / postfix / blacklisted_domains中：
bad.domain1 REJECT bad.domain2 REJECT baduser@bad.domain3 REJECT
不要忘记对该文件进行postmap.
