Poco giving connection error message

I am trying to use the Poco library to send an email. Platform is OS X, Yosemite 10.10.2 I am using Qt 5.3 32 bit. I followed the official instructions from here, and since I am using 32 bit Qt, and want the libraries to be statically linked, I used ./configure --static --config=Darwin32. And it installed in /usr/local correctly, following which I linked the necessary libraries (PocoNet and PocoFoundation), and tried this following code, which I found here. What I am trying to do is send an email to my gmail account from my account itself:

#include "MailSender.hpp"

#include "Poco/Net/SMTPClientSession.h"
#include "Poco/Net/MailMessage.h"
#include <iostream>
#include <QDebug>

using namespace Poco::Net;

MailSender::MailSender()
{
    try
        {
          MailMessage msg;

          msg.addRecipient (MailRecipient (MailRecipient::PRIMARY_RECIPIENT,
                                           "my email id",
                                           "Some name"));

          msg.setSender ("<myname> <my email id>");

          msg.setSubject ("some subject");
          msg.setContent ("Sending mail from C++ using POCO C++ Libraries");

          SMTPClientSession smtp ("smtp.gmail.com"); // SMTP server name
          smtp.login ("smtp.gmail.com",SMTPClientSession::AUTH_LOGIN,"my mail id","my_password");
          smtp.sendMessage (msg);
          smtp.close ();
          qDebug() << "Sent << endl;
        }
      catch (std::exception &e)
        {
        qDebug() << "Damn!" << e.what() << endl;
        }
}

However, I am getting a Damn! Connection refused message. Any idea how do I fix this?

Edit: I found that SecureSMTPClientSession is recommended for secure login. However, I don't find any such header file in Poco/Net. What I did is ./configure --static --config=Darwin32, followed by make -s and then make -s install. Then I found the static libraries and includes in /usr/local..