配置sendmail采用m4宏处理程序的时候报错：

[root@test1 mail]# m4 sendmail.mc

sendmail.mc:10: m4: cannot open `/usr/share/sendmail-cf/m4/cf.m4': No such file or directory


解决方法：

[root@test1 mail]# yum install sendmail-cf -y


   OK ！