NameNotFoundException for Mail when migrating Seam app from EAP 5 to 6

Issue

• Migrating Seam 2 application from EAP 5 to 6. We're using the Mail component of Seam, and we're getting this error:

Caused by: javax.naming.NameNotFoundException: Mail -- service jboss.naming.context.java.Mail
    at org.jboss.as.naming.ServiceBasedNamingStore.lookup(ServiceBasedNamingStore.java:103)
    at org.jboss.as.naming.NamingContext.lookup(NamingContext.java:197)
    at org.jboss.as.naming.InitialContext$DefaultInitialContext.lookup(InitialContext.java:241)
    at org.jboss.as.naming.NamingContext.lookup(NamingContext.java:183)
    at org.jboss.as.naming.NamingContext.lookup(NamingContext.java:179)
    at javax.naming.InitialContext.lookup(InitialContext.java:411) [rt.jar:1.7.0_40]
    at javax.naming.InitialContext.lookup(InitialContext.java:411) [rt.jar:1.7.0_40]
    at org.jboss.seam.mail.MailSession.getSession(MailSession.java:64) [jboss-seam-2.2.0.GA.jar:2.2.0.GA]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_40]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.7.0_40]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_40]
    at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_40]
    at org.jboss.seam.util.Reflections.invoke(Reflections.java:22) [jboss-seam-2.2.0.GA.jar:2.2.0.GA]
    at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:144) [jboss-seam-2.2.0.GA.jar:2.2.0.GA]
    ... 58 more