Start EAP deploy attached deployment create credentials store => /subsystem=elytron/credential-store=mail-credential-store:add(uri="cr-store://test/mail-credential-store?keyStoreType=JCEKS;modifiable=true;create=true", relative-to=jboss.server.data.dir, credential-reference={clear-text=clear-text-value-passdlfkj4}) create mail session => /subsystem=mail/mail-session=aaa:add(jndi-name="java:jboss/mail/aaa") create mail server pointing to the credential reference without provided alias => /subsystem=mail/mail-session=aaa/server=smtp:add(outbound-socket-binding-ref=mail-smtp, credential-reference={store=mail-credential-store}, username=aaa) request password authentization on the mail session and check used password, for this you can use attached application and doing request e.g. via curl => curl -i 'http://localhost:8080/mail_server_attributes/mailPassword.jsp?jndiName=java:jboss/mail/aaa&protocol=smtp' You should get no password => application returning FAIL, but instead you get "undefined"