Jboss configuration in standalone.xml for Gmail
<mail-session jndi-name="java:jboss/mail/Default">
<smtp-server ssl="true" outbound-socket-binding-ref="mail-smtp">
<login name="username" password="******"/>
</smtp-server>
</mail-session>
<outbound-socket-binding name="mail-smtp">
<remote-destination host="smtp.gmail.com" port="465"/>
</outbound-socket-binding>