501 Command "HELO" requires an argument

Question

I repost this message, since I keep getting the same problem.
Keep getting the following error message while trying to run the code I've cut & pasted below on IBM AS400 machine. Can anybody help
javax.mail.MessagingException: 501 Command "HELO" requires an argument
import java.util.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
public class xxJMail {
public static void main(String[] args) {
if (args.length < 4) {
System.out.println("usage: java xxJMail <to> <from> <subject> <message> <file>");
System.exit(1);
String to = args[0];
String from = args[1];
String subject = args[2];
String message = args[3];
String host = "BLY1-SMTP1";
String filename = null;
MimeBodyPart mbp1 = new MimeBodyPart();
MimeBodyPart mbp2 = new MimeBodyPart();
if ( args.length > 4)
{filename = args[4];}
// create some properties and get the default Session
Properties props = System.getProperties();
props.put("mail.smtp.host", host);
Session session = Session.getDefaultInstance(props, null);
try {
// create a message
MimeMessage msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(from));
InternetAddress[] address = {new InternetAddress(to)};
msg.setRecipients(Message.RecipientType.TO, address);
msg.setSubject(subject);
mbp1.setText(message);
// if file name pass as argument attach the file to the message
if( filename != null)
{ FileDataSource fds = new FileDataSource(filename);
mbp2.setDataHandler(new DataHandler(fds));
mbp2.setFileName(fds.getName());
// create the Multipart and its parts to it
Multipart mp = new MimeMultipart();
mp.addBodyPart(mbp1);
if( filename != null)
{ 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);
} catch (MessagingException mex) {
mex.printStackTrace();
Exception ex = null;
if ((ex = mex.getNextException()) != null) {
ex.printStackTrace();
}

Answer 1

Helo.
I had the same problems and it can be solved this way :
Your code was :
// create some properties and get the default Session
Properties props = System.getProperties();
props.put("mail.smtp.host", host);
Yo should add
props.put("mail.smtp.localhost", smtpServerName);
For example, you want to send an email using a smtp server called "toto" and you get the follwing error :
class javax.mail.MessagingException: 501 Syntax: HELO hostname
' just add :
props.put("mail.smtp.localhost", "toto");
And now it should works fine.
Hope it helps.