Mail error

[orchid]

Am new to sending mail and am getting this error when I try to send. Am using Eclipse and the class compiles but fails when it runs.
Exception in thread "main" java.lang.NoClassDefFoundError: javax/activation/DataSource at test.MailTest.mail(MailTest.java:51)
This is line 51:

Code:

Message msg = new MimeMessage(session);

thanks.

[derrickD]

When using javax mail you need to have a jar called activation.jar in your path. That will make this error go away.