Policy server setup

[Omar Eljumaily]

Hi, I'm trying to set up a simple policy server described here:
http://www.postfix.org/SMTPD_POLICY_README.html#client_config

I've written a simple server in c++, and have also tried numerous 
examples written in Perl, and still can't get it to work.  My logs 
suggest that the server is never being called.

Here's my setup in main.cf.  The server I'm testing is the one with 
inet:127.0.0.1:3001.  The greylist server works already, but I want to 
add another one.

smtpd_recipient_restrictions =
   permit_mynetworks,
   permit_sasl_authenticated,
   reject_unauth_destination,
   reject_rbl_client zen.spamhaus.org,
#   reject_rbl_client xbl.spamhaus.org,
  check_policy_service inet:127.0.0.1:3001,
   check_recipient_access hash:/etc/postfix/greylist_optin
#  check_policy_service unix:private/policy <--- Also tried private 
Spawn configuration which didn't work

#policy_time_limit = 3600

smtpd_restriction_classes = greylist

My c++ code is roughly this.  What I want to do is simply add a header 
to all email messages, "Mypol: test123";

void Server1::doListen()
{
    _serverSocket.setListener(this);
    _serverSocket._address = "localhost";
    _serverSocket._port = 3001;
    _serverSocket.doListen1();
}

void Server1::addValue(StringMap &a,const std::string &line)
{
    int i = line.find("=");
    if(i < 0)
        return;
    std::string key = line.substr(0,i);
    a[key] = line.substr(i + 1);
}

void Server1::acceptSocket(SocketHelper *sock)
{

    StringMap a;

    try
    {
        std::string line = sock->readLine();


        while (line != "")
        {
            addValue(a, line);
            line = sock->readLine();
        }

        sock->write("action=PREPEND Mypol: test123\n\n");
    }
    catch (OMException e)
    {

    }

}

Thanks,

Omar