sending an email in java

jobonar

hi i'm trying to send an email but i'm having a bit of trouble. the code below is what i'm using. there's no errors but the email doesnt send! just wondering if anyone could help! thanks

import java.util.Date;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

import java.io.UnsupportedEncodingException;

public class SendEmail {
	
	public void sendMail()
	{
		Properties myProperties=new Properties();
                
		
		myProperties.put("mail.smtp.host", "smtp.gawab.com");
		myProperties.put("mail.smtp.auth", "true");
                
		Authenticator sc= new ServerConnection();
		Session ses = Session.getDefaultInstance(myProperties,sc);
	
		Message msg=new MimeMessage(ses);
		
		try {
			msg.setFrom(new InternetAddress("me@gawab.com","name"));
			
			msg.setRecipient(Message.RecipientType.TO,new InternetAddress("address@gmail.com"));

			msg.setSubject("TEST");
			String body = "Test Mail";
			msg.setText(body);
			
			msg.setSentDate(new Date());
			
			Transport.send(msg);
			
		} catch (AddressException e) {
			e.printStackTrace();
		} catch (MessagingException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
	}
        
        

}

the code below is how i'm passing in my username and passsword to the host!

import javax.mail.PasswordAuthentication;

public class ServerConnection extends javax.mail.Authenticator
{
 public PasswordAuthentication ServerLogin()
    {
        String username = "name";
        String password = "password";
        return new PasswordAuthentication(username, password);
    }
}

scojones

Do you have a mail server running on the computer that this code is executed on?

pH

You don't need a mail server running on the machine that's running the java code, I've used javax.mail from clients to SMTP servers without problem.

However, SMTP by default doesn't use sender identification and many live mail servers (because of spam/relay etc) are very picky about how clients connect and what from/to addresses they use.

You code looks very similar to mine (that works and does exactly the same thing without authentication) so possibly it's down to the mail server.

One other thing - don't suppress the exceptions by printing them, throw them on as runtime exceptions just in case your code is throwing an exception and your not capturing the console output properly.

nialo

Either that or add in a catch block for all exceptions.

catch( Exception e)
{
}

lynchie

myProperties.put("mail.debug", "true");

and retry

jobonar

thanks for the replies

lynchie wrote:

myProperties.put("mail.debug", "true");

and retry

do i add that line in or do i replace a line with that code?

Ziycon

If your running it on a college or work network the smtp port may be shutdown which would stop the mail being sent and wound'nt give any errors.

jobonar

Ziycon wrote:

If your running it on a college or work network the smtp port may be shutdown which would stop the mail being sent and wound'nt give any errors.

no i'm running it on my laptop at home!

Hobbes

nialo wrote:

Either that or add in a catch block for all exceptions.

catch( Exception e)
{
}

That wouldn't do anything. If there was an uncaught error it would just stop the program. Looks like all their exceptions that would be thrown are being caught.

Do you have a tool for intercepting the traffic of whats going to the port? Could try looking at that.

Also trying using putty and connect to the SMTP port and manually type a test mail in. See if it refuses you for some reason.

smcelhinney

you're not on one of these weird ISPs that proxys requests and requires authentication are you?

Try setting a proxy, cant remember the syntax but if you google 'http.proxy java' that should get you somewhere. Its something like

System.setProperties("http_proxy.user", username);
System.setProperties("http_proxy.pass", password);

NB: Be careful using System.setProperties though, these variables are then set globally. You might consider trying this in the command line first

eg

java -Dhttp.proxyHost=your.proxy.dom -Dhttp.proxyPort=XX -Dhttp.proxyUser=foo -Dhttp.proxyPass=bar SendEmail

HTH,
Stephen

lynchie

jobonar wrote:

thanks for the replies




do i add that line in or do i replace a line with that code?

You add it in.. though if you had to ask that, you should probably read up some more on the javamail API.

Turn on debug and you will see the full smtp conversation, and then you can figure out if its a proxy issue] / auth issue / connection issue.

warrenaldo

here is my code for the exact same problem. very similar to yours - using javamail.

use mine as compare and contrast - it may help

lynchie wrote:

public void postMail(String recipient, String subject, String message) throws MessagingException
{
String from = "fromemail@google.com";
//String finalmessage = "FOR YOUR ATTENTION\n\nA Email has been assigned to you!!!\n\n"
// + message +
// "\nThanks and Regards" +
// "\nMy Deadly System.";
boolean debug = false;
//Set the host smtp address
Properties props = new Properties();
props.put("mail.smtp.host", "mysmtphost");
props.put("mail.smtp.auth", "true");

// create some properties and get the default Session
Authenticator loAuthenticator = new MailAuthenticator();
Session session = Session.getDefaultInstance(props, loAuthenticator);
session.setDebug(debug);

// create a message
Message msg = new MimeMessage(session);

// set the from and to address
InternetAddress addressFrom = new InternetAddress(from);
msg.setFrom(addressFrom);

InternetAddress[] addressTo = new InternetAddress[1];
addressTo[0] = new InternetAddress(recipient);
msg.setRecipients(Message.RecipientType.TO, addressTo);

// Setting the Subject and Content Type
msg.setSubject(subject);
msg.setContent(message, "text/plain");
System.out.println("Sending");
Transport.send(msg);
}

public class MailAuthenticator extends Authenticator {

public PasswordAuthentication
getPasswordAuthentication() {
String username, password;

username = "myusername";
password = "mypassword";

return new PasswordAuthentication(
username, password);
}
}*/

Without the password authentication i cpould not send external mail - only internal.
if you want to check this out maybe sending mail to yourself is the best bet. at least that way its going to your smtp host and no1 elses. it might simulate internal mail only - not sure.