If you don't already have iPlanet Web Server installed and running, you'll need to download it
from the iPlanet Web Server  product page and install it. We tested the JavaMailServlet with
these configurations.

(on Solaris)

 iPlanet Web Server 4.1 (binary)
(on NT)
 iPlanet Web Server 4.1 (binary)
To run the JavaMailServlet, you must add the JavaMail and JavaBeans Activation Framework
jar files to the CLASSPATH environment variable (this is documented in the JavaMail README file
and additional Windows NT information is provided here).

Once this is done, restart the web server.
 

Additional Notes

iPlanet Web Server 4.1 does not use a SecurityManager or enforce any Java security policy.