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My First Try Of JavaMail - NoClassDefFoundError

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1. I placed the activation.jar and mail.jar in
2. I compiled the program C:\javamail-1.3.1\demo>javac msgsend.java
SMTP Server: I downloaded James-2.1.3
1. James-2.1.3 is up and running because the messages shown below are
in the console
Using PHOENIX_HOME: F:\dev\james-2.1\james-2.1
Using PHOENIX_TMPDIR: F:\dev\james-2.1\james-2.1\temp
Using JAVA_HOME: F:\system\jdk\1.4.2
Phoenix 4.0.1
James 2.1
Remote Manager Service started plain:4555
POP3 Service started plain:110
SMTP Service started plain:25
NNTP Service Disabled
Fetch POP Disabled
2. I successfully added two users: Caroline and John to James-2.1.3

When I tried to send a message for testing purpose:
C:\javamail-1.3.1\demo>java msgsend -o John@localhost -M smtp.localhost Caroline@localhost
I got Exception in thread "main" java.lang.NoClassDefFoundError: javax/mail/message
Please help me in fixing the problem.
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