Re: sendmail.jsp: How do I know that mail was send ?

"Dado" <>
Thu, 13 Jul 2006 11:24:22 +0200
"Dado" <> je napisao u poruci interesnoj

I have a small form on my web page with which the visitors send me a

In sendmail.jsp it was written:
   SendMail sendMail = new SendMail();
   sendMail.sendMail(to, from, subject, content, "localhost");

to, from, subject, content
pokupim iz html forme.

sendMail method in SendMail class looks like this:

   public static void sendMail(String to, String from, String subject,
String content, String host) throws Exception {
       // create some properties and get the default Session

       host = "localhost";

       Properties props = new Properties();
       props.put("", host);

       Session session = Session.getDefaultInstance(props, null);

       try {
           // create a message
           MimeMessage msg = new MimeMessage(session);
           msg.setFrom(new InternetAddress(from));
  msg.setHeader("Content-Type", "text/plain; charset=windows-1250");
           InternetAddress[] address = {new InternetAddress(to)};
           msg.setRecipients(Message.RecipientType.TO, address);
  //msg.setHeader("Content-Transfer-Encoding", "8bit");

           msg.setSentDate(new Date());
           // If the desired charset is known, you can use
           // setText(text, charset)

       } catch (MessagingException mex) {
           System.out.println("\n--Exception handling in");

           Exception ex = mex;
           do {
               if (ex instanceof SendFailedException) {
                   SendFailedException sfex = (SendFailedException)ex;
                   Address[] invalid = sfex.getInvalidAddresses();
                   if (invalid != null) {
                       System.out.println(" ** Invalid Addresses");
                       if (invalid != null) {
                           for (int i = 0; i < invalid.length; i++)
                               System.out.println(" " +
                   Address[] validUnsent = sfex.getValidUnsentAddresses();
                   if (validUnsent != null) {
                       System.out.println(" ** ValidUnsent Addresses");
                       if (validUnsent != null) {
                           for (int i = 0; i < validUnsent.length; i++)
                   Address[] validSent = sfex.getValidSentAddresses();
                   if (validSent != null) {
                       System.out.println(" ** ValidSent Addresses");
                       if (validSent != null) {
                           for (int i = 0; i < validSent.length; i++)
               if (ex instanceof MessagingException)
                   ex = ((MessagingException)ex).getNextException();
                   ex = null;
           } while (ex != null);

Code above send mail successfully if the visitor wrote "from" mail
correctly. But if the visitor leave "from field" empty or put some wrong
mail I need to send him/her a message about un/success sending of comment
to me. How to do it ?

Now I have another question about code above. When I tested with wrong
"from" mail I got SendFailedException and if I after that reedit the form
("from" mail) I got SendFailedException with the previous mail. How it can
be possible when I create new implemenation of SendMail.class after I call
sendmail.jsp again ?

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