Where can I find information about the GlassFish Connectors API implementation?

GlassFish contains an implementation of the Connectors API and the Mail API. The Connectors implementation module home page is at https://glassfish.java.net/javaee5/integration-tech/glassfish_connectors.html. The Mail API implementation home page is at https://glassfish.java.net/javaee5/mail/.