Thanks for rob0's proposal I need to read avary word of tow document http://www.postfix.org/TLS_README.html http://www.postfix.org/TLS_LEGACY_README.html
sorry ,in my system, I can't find the CA.pl I have no idea how to find it, [root@mtayd local]# pwd /usr/local [root@mtayd local]# ls bin etc games include lib lib64 libexec sbin share src so I use another command, but I don't know it right or not. [root@mtayd CA]# openssl genrsa -des3 -out cakey.pem Tom 2012/8/21 Wietse Venema <wie...@porcupine.org> > Feel Zhou: > > [root@mtayd CA]# openssl ca -out postfix_cert.pem -infiles > > If you want help, show that you follow the TLS_README > instructions exactly. > > $ script output-file-name > $ /some/where/CA.pl -newca > ... > $ exit > > Then send the contents of output-file-name. > > Wietse >