postfix+dovecot 无法给多个人发送邮件的解决方法

postfix无法给多个人发送邮件，错误日志：

Mar 16 18:25:18 mail postfix/pipe[6725]: 18E9485D864D: to=, relay=dovecot, delay=912, delays=912/0.01/0/0.01, dsn=4.3.5, status=deferred (mail system configuration error)

Mar 16 18:25:18 mail postfix/pipe[6725]: 18E9485D864D: to=, relay=dovecot, delay=912, delays=912/0.01/0/0.01, dsn=4.3.5, status=deferred (mail system configuration error)

Mar 16 18:25:18 mail postfix/pipe[6725]: warning: pipe flag `D' requires
dovecot_destination_recipient_limit = 1

Mar 16 18:25:57 mail postfix/postfix-script[6739]: refreshing the Postfix mail system

Mar 16 18:25:57 mail postfix/master[4808]: reload -- version 2.8.2, configuration /etc/postfix

解决方法：

编辑/etc/postfix/main.cf，添加：

dovecot_destination_recipient_limit = 1

重启postfix

/etc/init.d/postfix reload