postfix如何过滤某个域名邮件的发送？

mail日志中可以看到有些无效的域名邮件可以直接丢弃

1. 5305   example.com[93.184.216.119]:25: Connection timed out
2. 1265   mail.qq.co[50.23.198.74]:25: Connection refused
3.   394   Host not found, try again
4.   374   qqq.com[98.126.157.163]:25: Connection refused

设置check_recipient_access访问表 在smtpd_recipient_restrictions参数中增加check_recipient_access hash:/etc/postfix/recipient_access 例:

smtpd_recipient_restrictions = 
   check_recipient_access hash:/etc/postfix/recipient_access,permit_mynetworks,permit_sasl_authenticated,
   reject_invalid_hostname,reject_non_fqdn_hostname,      reject_unknown_sender_domain,reject_non_fqdn_sender,
    reject_non_fqdn_recipient,reject_unknown_recipient_domain,
    reject_unauth_pipelining,reject_unauth_destination

/etc/postfix/recipient_access内容为：

1. xxx@example.com   REJECT  #具体地址
2. example.com             REJECT  #对整个域实现访问控制

postmap /etc/postfix/recipient_acces 之后执行 postfix reload