I'm under the impression Bamboo only supports SSL XMPP connections, not TLS. SSL on port 5223 is depreciated by XMPP standards and was recently removed from Ejabberd. As far as I can tell the agreed upon standard is now TLS on port 5222. Bamboo should support this.

Apparently Smack supports TLS:
http://stackoverflow.com/questions/545082/how-to-create-an-ssl-connection-using-the-smack-xmpp-library
http://www.igniterealtime.org/issues/browse/SMACK-113