and the 'mail-ra.jar'?
Since neither of those jars is used in the build (compile or run-time), why would you need them? Keep in mind that some of the Seam features were not integrated with Seam-1.2.1.GA and you may want to consider either Seam-2.0.x, or Seam-2.1.x.
In Seam-1.2.1.GA one can build the example project which run on Tomcat. So I build the project first with 'ant war.tomcat'. Then according to the jars in the WAR I can construct the 'pom-xml' and build the project using maven2.
But in Seam-2.1.1.GA there is no target for building project to run on Tomcat.