CentOS 6內建postfix無法發信解決

CentOS 6內建postfix無法發信解決 通過系統內建的rpm包安裝postfix之後，執行mail -s...測試發信無法成功。maillog如下： May 29 10:44:04 cl101 postfix/pickup[31536]: BA5662A0AFC: uid=0 from=<root>May 29 10:44:04 cl101 postfix/cleanup[31559]: BA5662A0AFC: message-id=<20130529024404.BA5662A0AFC@cl101.dev.bizcn.com>May 29 10:44:04 cl101 postfix/qmgr[31537]: BA5662A0AFC: from=<root@cl101.dev.bizcn.com>, size=3431896, nrcpt=1 (queue active)May 29 10:44:04 cl101 postfix/smtp[31561]: fatal: unknown service: smtp/tcpMay 29 10:44:05 cl101 postfix/qmgr[31537]: warning: private/smtp socket: malformed responseMay 29 10:44:05 cl101 postfix/qmgr[31537]: warning: transport smtp failure -- see a previous warning/fatal/panic logfile record for the problem descriptionMay 29 10:44:05 cl101 postfix/master[31534]: warning: process /usr/libexec/postfix/smtp pid 31561 exit status 1May 29 10:44:05 cl101 postfix/master[31534]: warning: /usr/libexec/postfix/smtp: bad command startup -- throttlingMay 29 10:44:05 cl101 postfix/error[31562]: BA5662A0AFC: to=<wmwu@bizcn.net>, relay=none, delay=1.3, delays=0.23/1/0/0.02, dsn=4.3.0, status=deferred (unknown mail transport error) 這是由於postfix無法讀取service檔案所致。查看service的許可權為640： [root@cl101 etc]# ll|grep services -rw-r-----.  1 root root 641243 Nov  7  2012 services 於是將其改為644：[root@cl101 etc]# ll|grep services        -rw-r--r--.  1 root root 641243 Nov  7  2012 services 然後重試，即可解決此問題。