java - Error in triggering mails through simple program -

hi trying trigger mail through program getting error below. can possible can trigger mail dam.da@abc.com using host 192.168.195.68 , default port 25 default instance dont have create session , pass passswords , different username. please me on this.

![import java.util.*; import javax.mail.*; import javax.mail.internet.*; import javax.activation.*;  public class sendemail {    public static void main(string \[\] args)    {           // recipient's email id needs mentioned.       string = "dam.da@abc.com";        // sender's email id needs mentioned       string = "dam.da@abc.com";        // assuming sending email localhost       string host = "192.168.195.68";        // system properties       properties properties = system.getproperties();        // setup mail server       properties.setproperty("mail.smtp.host", host);        // default session object.       session session = session.getdefaultinstance(properties);        try{          // create default mimemessage object.          mimemessage message = new mimemessage(session);           // set from: header field of header.          message.setfrom(new internetaddress(from));           // set to: header field of header.          message.addrecipient(message.recipienttype.to,                                   new internetaddress(to));           // set subject: header field          message.setsubject("this subject line!");           // set actual message          message.settext("this actual message");           // send message          transport.send(message);          system.out.println("sent message successfully....");       }catch (messagingexception mex) {          mex.printstacktrace();       }    } }