Problem Sending mails in a loop using JavaMail API

Question

Hello All,
I am sending emails in a loop(one after the other) using JavaMail API,but the problem is, if the first two,three email addresses in the loop are Valid it sends the Email Properly, but if the Fourth or so is Invalid Address it throws an Exception....
"javax.mail.SendFailedException: Sending failed;"
nested exception is:
javax.mail.SendFailedException: Invalid Addresses;
nested exception is:
javax.mail.SendFailedException: 450 <[email protected]>:Recipient address rejected: Domain not found......
So if i want to send hundereds of emails and if one of the Emails inbetween is Invalid the process Stops at that point and i could not send the other emails in the Loop......
How Could i Trap the exception thrown and handle it in such a way, so that the loops continues ..
Is there something with the SMTP Server....?
The code which i am using is as follows....
<Code>...
try {
InitialContext ic = new InitialContext();
Session session = (Session) ic.lookup(JNDINames.MAIL_SESSION);
if (Debug.debuggingOn)
session.setDebug(true);
// construct the message
MimeMessage msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(eMess.getEmailSender()));
String to = "";
msg.setRecipients(Message.RecipientType.TO,
InternetAddress.parse(to, false));
msg.setRecipients(Message.RecipientType.BCC,
InternetAddress.parse(eMess.getEmailReceiver(), false));
msg.setSubject(eMess.getSubject());
msg.setContent(eMess.getHtmlContents(),"text/plain");
msg.saveChanges();                
Transport.send(msg);
} catch (Exception e) {
Debug.print("createAndSendMail exception : " + e);
throw new MailerAppException("Failure while sending mail");
</Code>....
Please give me any suggestions regarding it....and guide me accordingly..
Thanks a million in advance...
Regards
Sam

Answer 1

How about something like the code attached here. Be aware it is lifted and edited out of an app we have here so it may require changing to get it to work. If it don't work - don't come asking for help as this is only a rough example of one way of doing it. RTFM - that's how we worked it out!
SH
try {
Transport.send(msg);
// If we get to here then the mail went OK so update all the records in the email as sent
System.out.println("Email sent OK");
catch (MessagingException mex) {
System.out.println("Message error");
Exception ex = mex;
do {
if (ex instanceof SendFailedException) {
if (ex.getMessage().startsWith("Sending failed")) {
// Ignore this message as we want to know the real reason for failure
// If we get an Invalid Address error or a Message partially delivered message process the message
if (ex.getMessage().startsWith("Message partially delivered")
|| ex.getMessage().startsWith("Invalid Addresses")) {
// This message is of interest as we need to process the actual individual addresses
System.out.println(ex.getMessage().substring(0, ex.getMessage().indexOf(";")));
// Now get the addresses from the SendFailedException
SendFailedException sfex = (SendFailedException) ex;
Address[] invalid = sfex.getInvalidAddresses();
if (invalid != null) {
System.out.println("Invalid Addresse(s) found -");
if (invalid.length > 0) {
for (int x = 0; x < invalid.length; x++) {
System.out.println(invalid[x].toString().trim());
Address[] validUnsent = sfex.getValidUnsentAddresses();
if (validUnsent != null) {
System.out.println("Valid Unsent Addresses found -");
if (validUnsent.length > 0) {
for (int x = 0; x < validUnsent.length; x++) {
System.out.println(validUnsent[x].toString().trim());
Address[] validSent = sfex.getValidSentAddresses();
if (validSent != null) {
System.out.println("Valid Sent Addresses found -");
if (validSent.length > 0) {
for (int x = 0; x < validSent.length; x++) {
System.out.println(validSent[x].toString().trim());
if (ex instanceof MessagingException)
ex = ((MessagingException) ex).getNextException();
else {
// This is a general catch all and we should assume that no messages went and should stop
System.out.println(ex.toString());
throw ex;
} while (ex != null);