Sending Email Problem : Connection refused
<system.net>
    <mailSettings>
      <smtp>
        <network
          host="localhost"
          port="25"
          defaultCredentials="true"
        />
      </smtp>
    </mailSettings>
  </system.net>

<system.net>
    <mailSettings>
      <smtp from="yourMailId@gmail.com ">
        <network host="smtp.gmail.com" defaultCredentials="false"
      port="587" userName ="yourMailId@gmail.com" password="yourMailPassword" />
      </smtp>
    </mailSettings>
   </system.net>

SmtpClient client = new SmtpClient();
client.EnableSsl = true;