I am facing a SMTP authorization related problem even though I have followed the procedures in the Java Mail API. The code snippet is as follows:

// code begins..

			

			Authenticator auth = new BIMAuthenticator(mailOption.username, mailOption.password);
			

			

			session = Session.getDefaultInstance(props, auth);
			

			session.setDebug(false);
			

			mimeMsg = makeMessage(session, ...);
			

			

			Transport transport = session.getTransport("smtp");
			

			

			transport.connect(mailOption.outserver,
			

			mailOption.username, mailOption.password);
			

			

			mimeMsg.saveChanges();
			

			

			transport.sendMessage(mimeMsg, mimeMsg.getAllRecipients());
			

			

			transport.close();
			

		

// code ends

I get two different errors from two different mail servers:

Mail server 1:

*************

nested exception is:
javax.mail.SendFailedException: 550 Relaying is prohibited

at java.lang.Throwable. (Compiled Code)
at java.lang.Exception. (Compiled Code)
at javax.mail.MessagingException. (MessagingException.java:52)
at javax.mail.SendFailedException. (SendFailedException.java:73)
at com.sun.mail.smtp.SMTPTransport.rcptTo(Compiled Code)
at com.sun.mail.smtp.SMTPTransport.sendMessage(Compiled Code)
at moeza.mail.BIMInternetSendThread.run(BIMInternetSendThread.java:84)

Mail server 2

*************

javax.mail.SendFailedException: 473 sridhar_r90@rediffmail.com you should authenticate first

at java.lang.Throwable. (Compiled Code)
at java.lang.Exception. (Compiled Code)
at javax.mail.MessagingException. (MessagingException.java:39)
at javax.mail.SendFailedException. (SendFailedException.java:42)
at com.sun.mail.smtp.SMTPTransport.rcptTo(Compiled Code)
at com.sun.mail.smtp.SMTPTransport.sendMessage(Compiled Code)
at moeza.mail.BIMInternetSendThread.run(BIMInternetSendThread.java:91)

Is there any fool proof method to perform SMTP authorisation using javamail API?

Thanks a lot for your time..

Sridhar