Sending Mail from jsp

Question

Hi guys,
can anyone help me out of this problem ??
I have written a piece of code which sends mail from a jsp page.
When I use the 'Recipient'(TO) as an address in the same domain
(ie,<xxx>@<apeejaygroup.com>) it works fine.
But when I use an address such as <xxx>@<rediffmail.com>
the code gives an error like -
"javax.mail.SendFailedException: Sending failed;
nested exception is:
javax.mail.SendFailedException: Invalid Addresses;
nested exception is:
javax.mail.SendFailedException: 550 5.7.1 ... Relaying denied"
I am sending the piece of code for reference..
String host ="192.168.33.11";
String from="[email protected]";
String to="<xxx>@apeejaygroup.com";
( HERE USING THE ADDRESS AS <xxx>@<rediffmail>.com
GIVES THE EXCEPTION - javax.mail.SendFailedException: 550 5.7.1 ... Relaying denied )
Properties props = System.getProperties();
props.put("mail.smtp.host", host);
javax.mail.Session session1 = javax.mail.Session.getDefaultInstance
(props, null);
MimeMessage message = new MimeMessage(session1);
message.setFrom(new InternetAddress(from));
message.addRecipient(Message.RecipientType.TO,new InternetAddress(to));
message.setSubject("Your Registration Details");
message.setContent(body,"text/html");
Transport.send(message);
Please help me out of this.
Regards
Satrajit

Answer 1

as you said that it might require authentication
but our mail server doesn't require authentication to mail.
Now what should i do ??Many servers are now authenticating by requiring you to fetch your e-mail before sending. This is basically because most SMTP mail servers CAN NOT authenticate in the normal sense of the word. So, they use the fetch process for authentication. The fetch process already requires authentication normally. Then your IP address will be good for, say, 20 minutes, and you can relay e-mail through the server.
It works with most E-mail clients such as Outlook or Netscape, because the default behavior is to 1.Connect to the POP server, 2.Login, 3.Download any new mail, 4.Connect to the SMTP server, 5.Upload any mail to send.
Even if you don't have any mail, your IP address will at least have been authenticated. Even if you just check for mail, and not download any, you should be OK.
So what I'd suggest is that you write some code that attempts to connect to your mail system's POP server, get authenticated successfully, then try sending out the e-mail through the SMTP server.