Sending mail with JavaMail

[Andrés Reyes]

Hi. I need to send an email using a servlet (Tomcat 4.1 / Debian 3.1), 
but when I send the form from the jsp page that call the servlet, i get 
this exception:

javax.servlet.ServletException: Servlet execution threw an exception
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:222)
        at 
org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:51)
        (...)

*root cause*

java.lang.NoClassDefFoundError: javax/activation/DataSource at 
AltaCliente.doPost(AltaCliente.java:63) at 
javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at 
javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

This is the code of the servlet (which compiles with no problem):

---------------------------------
import java.io.*;
...
...

try {
                       Properties props = new Properties();
                       props.put("mail.smtp.host", "mail.***.***");
                       Session s = Session.getInstance(props);
                       MimeMessage message = new MimeMessage(s);

                       InternetAddress from = new 
InternetAddress("[EMAIL PROTECTED]");
                       message.setFrom(from);
                       InternetAddress to = new 
InternetAddress("[EMAIL PROTECTED]");
                       message.addRecipient(Message.RecipientType.TO, to);

                       message.setSubject("Prueba de JavaMail.");
                       message.setText("Hola desde JavaMail ( y Tomcat 
). ");

                       Store store = s.getStore("pop3");
                       store.connect("mail.****.***", 
"[EMAIL PROTECTED]", "areyes");

                       Transport.send(message);
                       store.close();
} catch ( MessagingException e ) {
                       out.println("<h1>MessagingException: " + 
e.getMessage() + "</h1>");
...
...
---------------------------------

The content of the /WEB-INF/web.xml is ok (only describe the servlet and 
others that I use), and the xml configuration for the context is:  

---------------------------------
<Context path="/*****" docBase="/usr/share/tomcat4/server/webapps/******"
       debug="0" privileged="false">
<Resource name="mail/Session" scope="Shareable" type="javax.mail.Session"/>
         <ResourceParams name="mail/Session">
           <parameter>
             <name>mail.smtp.host</name>
             <value>mail.****.****</value>
           </parameter>
         </ResourceParams>

</Context>
---------------------------------

Thanks in advance.

--
/***********************************
* Andrés Reyes ( [EMAIL PROTECTED] )
* TCOR Desarrollos y Sistemas, S.L.
* Teléfono: 957 76 42 48 
* Fax     : 957 76 42 49
***********************************/


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