javax/mail/Message error

[Kalai Selvi]

I have written a program using javamail to send email.
When i run it as a standalone program, it works and sends email.

But, when i instantiate this class in my java program and call its method to send email,
it gives me

java.lang.NoClassDefFoundError: javax/mail/Message

I have mail.jar and activation.jar in the classpath.
My doubt is, why is it executing as a stand-alone program only?
Please help.

[Ulf Dittmer]

What is the difference between "run it as a standalone program" and "instantiate this class in my java program"? Both sound like a program is run from the command line, so the difference may be in how they are run (i.e., what is entered on the command line).

[Kalai Selvi]

I am sorry.. When i include it in web application(running on tomcat5), it gives out

java.lang.NoClassDefFoundError: javax/mail/Message

at runtime.

I meant it as standalone, when i gave a main method for the SendEmail.java and run it.

But, within tomcat it always says java.lang.NoClassDefFoundError: javax/mail/Message

I've checked my whole system. i have only one mail.jar

[Ulf Dittmer]

So do you have a copy of mail.jar in the WEB-INF/lib directory of your web app?