We want to send mail from inside my tomcat web application. I inherited some code from a predecessor that uses a context configuration file inside tomcat to define the data source that I use in my application through a JNDI lookup. This file currently looks like this: I have never been able to find documentation for this and never met the guy who did it so I don't really understand it, I simply know that it works. This morning, it occurred to me that I could use the same tools to configure the mail server. Does anyone know how to do this inside the context configuration file?