Exception thrown when trying to create MimeMessage

Question

Hello,
I was working on the tutorial for sending SMTP messages using the JavaMail API. I set up the Session using Properties fine, but I begin throwing exceptions when trying to construct a new MimeMessage.
Properties props = System.getProperties();
props.put("mail.smtp.host", MAILHOST);
props.put("mail.transport.protocol", "SMTP" );
Session session = Session.getInstance(props, null);
// Exceptions thrown below
MimeMessage rfc822Msg = new MimeMessage(session);
The exception error message I receive is:
Exception occurred during event dispatching:
java.lang.NoClassDefFoundError: javax/activation/DataSource
at MailApplet.actionPerformed(MailApplet.java:30)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:10
at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(Abstra
ton.java:1101)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
:378)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:250
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonL
er.java:204)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:2
at java.awt.Component.processMouseEvent(Component.java:3165)
at java.awt.Component.processEvent(Component.java, Compiled Code)
at java.awt.Container.processEvent(Container.java, Compiled Code)
at java.awt.Component.dispatchEventImpl(Component.java, Compiled Code)
at java.awt.Container.dispatchEventImpl(Container.java, Compiled Code)
at java.awt.Component.dispatchEvent(Component.java, Compiled Code)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2068
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:1852)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java, Compiled
at java.awt.Container.dispatchEventImpl(Container.java, Compiled Code)
at java.awt.Window.dispatchEventImpl(Window.java, Compiled Code)
at java.awt.Component.dispatchEvent(Component.java, Compiled Code)
at java.awt.EventQueue.dispatchEvent(EventQueue.java, Compiled Code)
at java.awt.EventDispatchThread.pumpOneEventForComponent(EventDispatchTh
java, Compiled Code)
at java.awt.EventDispatchThread.pumpEventsForComponent(EventDispatchThre
va:95)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:90)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
If you have any idea what is going on your help will be greatly appreciated.
I am using the jdk1.2.2 build and the JavaMail1.2 distribution.
Thanks,
William Mapp

Answer 1

Thanks for the help. Sorry I goofed. Now I have a question regarding what addresses you can send mail to. It seems that if I attempt send mail to a server other than the SMPT host I get a javax.mail.SendFailedException: Sending failed. The exception continues by stating that the address was Invalid, Relaying Denied.
What does this actually mean? Should i be supplying more information?
Thanks,
Will