class postfix {

$var = 1
$thing = asljdlajs
$bin_path = "/usr/sbin/"


file {

  "/etc/postfix/main.cf":
     content => tempalte("postfix/main.cf.erb");
}


}



class postfix::centos inherits postfix {

$var = 2

File["/etc/postfix/main.cf"] { content => template("postfix/main.cf.erb") }


}

class postfix::ubuntu inherits postfix {

$var = 2
$bin_path = "/usr/local/sbin"

File["/etc/postfix/main.cf"] { content => template("postfix/main.cf.erb") }

}