Mail Not send Properly

Question

Hi i had prepared a java program to send an attachment file it was compiled but when i interpret then it would show the error message as follows
PLEASE HELP ME
javax.mail.MessagingException: Unknown SMTP host: true;
nested exception is:
java.net.UnknownHostException: true
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1280)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:37
0)
at javax.mail.Service.connect(Service.java:275)
at javax.mail.Service.connect(Service.java:156)
at javax.mail.Service.connect(Service.java:105)
at javax.mail.Transport.send0(Transport.java:168)
at javax.mail.Transport.send(Transport.java:98)
at sendfile.postFile(sendfile.java:129)
at sendfile.main(sendfile.java:60)
Caused by: java.net.UnknownHostException: true
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:232)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:189)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1250)
... 8 more
java.net.UnknownHostException: true
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:232)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:189)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1250)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:37
0)
at javax.mail.Service.connect(Service.java:275)
at javax.mail.Service.connect(Service.java:156)
at javax.mail.Service.connect(Service.java:105)
at javax.mail.Transport.send0(Transport.java:168)
at javax.mail.Transport.send(Transport.java:98)
at sendfile.postFile(sendfile.java:129)
at sendfile.main(sendfile.java:60)
aND MY SOURCE CODE IS
import java.util.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
public class SendingFile
static String SMTP_HOST_NAME = "smtp.gmail.com";
static String SMTP_AUTH_USER = "xxxx";
static String emailSubjectTxt = "From xxx S/W";
static String SMTP_AUTH_USER = "xxx";
static String SMTP_AUTH_PWD = "xxxxx";
static String emailFromAddress = "xxxx ";
static StringBuffer sb = new StringBuffer();
static String[] emailList = {"[email protected]", "[email protected]"};
static String filename = "user.htm";
public static void main(String args[]) throws Exception
SendingFile smtpMailSender = new SendingFile();
smtpMailSender.postMail( emailList, emailSubjectTxt, emailFromAddress, filename);
// create some properties and get the default Session
for(int i = 0; i<emailList.length; i++)
System.out.println("Sucessfully Sent mail to All Users"+emailList);
public void postMail( String recipients[ ], String message , String from, String filename) throws MessagingException
boolean debug = false;
Properties props = new Properties();
props.put("mail.smtp.host", SMTP_HOST_NAME);
props.put("mail.smtp.host", "true");
Authenticator auth = new SMTPAuthenticator();
Session session = Session.getDefaultInstance(props, auth);
session.setDebug(debug);
// create a message
MimeMessage msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(from));
InternetAddress[] addressTo = new InternetAddress[recipients.length];
     for (int i = 0; i < recipients.length; i++)
     addressTo[i] = new InternetAddress(recipients[i]);
msg.setRecipients(Message.RecipientType.TO, addressTo);
// msg.setSubject(message);
// create and fill the first message part
MimeBodyPart mbp1 = new MimeBodyPart();
mbp1.setText(message);
// create the second message part
MimeBodyPart mbp2 = new MimeBodyPart();
// attach the file to the message
FileDataSource fds = new FileDataSource(filename);
mbp2.setDataHandler(new DataHandler(fds));
mbp2.setFileName(fds.getName());
// create the Multipart and add its parts to it
Multipart mp = new MimeMultipart();
mp.addBodyPart(mbp1);
mp.addBodyPart(mbp2);
// add the Multipart to the message
msg.setContent(mp);
// set the Date: header
// msg.setSentDate(new Date());
// send the message
Transport.send(msg);
private class SMTPAuthenticator extends javax.mail.Authenticator
     public PasswordAuthentication getPasswordAuthentication()
     String username = SMTP_AUTH_USER;
     String password = SMTP_AUTH_PWD;
     return new PasswordAuthentication(username, password);
Message was edited by:
muthu2007
Message was edited by:
muthu2007

Answer 1

props.put("mail.smtp.host", SMTP_HOST_NAME);
props.put("mail.smtp.host", "true");Remove the second line...
Christian