Java mail api exception

[oregon]

I'm trying to use the java mail api.
this is my code, I hope you can help me

Code:

Properties properties = System.getProperties();
properties .put("mail.smtp.host", host);
Session session = Session.getDefaultInstance(properties , null);
Message msg = new MimeMessage(session);

and this is the error:

Code:

java.lang.NoClassDefFoundError: com/sun/mail/util/SharedByteArrayInputStream"

[Ed]

If it compiles the jars should be on your system already. Just grep for .*ail.*jar and they should show up.