每次收发邮件报如下错误：
Sep 28 13:54:56 mail postfix/master[2278]: warning: process /usr/libexec/postfix/pipe??? pid 5438 exit status 1
Sep 28 13:54:56 mail postfix/master[2278]: warning: /usr/libexec/postfix/pipe???: bad command startup -- throttling
Sep 28 13:55:56 mail master[5447]: fatal: master_spawn: exec /usr/libexec/postfix/pipe???: No such file or directory
Sep 28 13:55:57 mail postfix/master[2278]: warning: process /usr/libexec/postfix/pipe??? pid 5447 exit status 1
Sep 28 13:55:57 mail postfix/master[2278]: warning: /usr/libexec/postfix/pipe???: bad command startup -- throttling
Sep 28 13:56:57 mail master[5453]: fatal: master_spawn: exec /usr/libexec/postfix/pipe???: No such file or directory
Sep 28 13:56:58 mail postfix/master[2278]: warning: process /usr/libexec/postfix/pipe??? pid 5453 exit status 1
Sep 28 13:56:58 mail postfix/master[2278]: warning: /usr/libexec/postfix/pipe???: bad command startup -- throttling
我正常用控制台输入命令收发邮件是没问题的，但是用outlook收发邮件，验证无法通过，总是让我输入密码，上述的错误，我看了一下文件，根本没有什么pipe？？？这个文件，outlook不验证也无法收发mail，这个问题困扰小弟2天了，有大神帮忙解决一下吗，不胜感激～～！！
