Open Source Institute

by goldie on Tue 5th May 6am

import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
import java.io.*;
import java.util.Properties;
public class SENDMAIL
{

public void sendMail(String mailServer, String from, String to,
String subject, String messageBody,
String[] attachments) throws
MessagingException, AddressException
{
// Setup mail server
Properties props = System.getProperties();
props.put("mail.smtp.host", mailServer);

// Get a mail session
Session session = Session.getDefaultInstance(props, null);

// Define a new mail message
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
message.setSubject(subject);

// Create a message part to represent the body text
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setText(messageBody);

//use a MimeMultipart as we need to handle the file attachments
Multipart multipart = new MimeMultipart();

//add the message body to the mime message
multipart.addBodyPart(messageBodyPart);

// add any file attachments to the message
addAtachments(attachments, multipart);

// Put all message parts in the message
message.setContent(multipart);

// Send the message
Transport.send(message);

}

protected void addAtachments(String[] attachments, Multipart multipart)
throws MessagingException, AddressException
{
for(int i = 0; i<= attachments.length -1; i++)
{
String filename = attachments[i];
MimeBodyPart attachmentBodyPart = new MimeBodyPart();

//use a JAF FileDataSource as it does MIME type detection
DataSource source = new FileDataSource(filename);
attachmentBodyPart.setDataHandler(new DataHandler(source));

//assume that the filename you want to send is the same as the
//actual file name - could alter this to remove the file path
attachmentBodyPart.setFileName(filename);

//add the attachment
multipart.addBodyPart(attachmentBodyPart);
}
}

public static void main(String[] args)
{
try
{
SENDMAIL MAIL = new SENDMAIL();
String server="pop3.gmail.com";
String from="username@gmail.com";
String to = "other user name@gmail.com";
String subject="Test";
String message="Testing";
String[] filenames =
{"c:/somefile.txt"};

MAIL.sendMail(server,from,to,subject,message,filenames);
}
catch(Exception e)
{
e.printStackTrace(System.out);
}

}
}
i want to send mail using this code but i getting exception like this.
avax.mail.MessagingException: Unknown SMTP host: pop3.gmail.com;
nested exception is:
java.net.UnknownHostException: pop3.gmail.com
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1543)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:453)
at javax.mail.Service.connect(Service.java:291)
at javax.mail.Service.connect(Service.java:172)
at javax.mail.Service.connect(Service.java:121)
at javax.mail.Transport.send0(Transport.java:190)
at javax.mail.Transport.send(Transport.java:120)
at SENDMAIL.sendMail(SENDMAIL.java:46)
at SENDMAIL.main(SENDMAIL.java:85)
Caused by: java.net.UnknownHostException: pop3.gmail.com
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:177)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:507)
at java.net.Socket.connect(Socket.java:457)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:267)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:227)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1511)
... 8 more
i have taken code from this siite only plz suggest me how to remove this exception.
thanks in advance.