Removing non existent mail server with standard name (via CLI) doesn't fail even though it should

/subsystem=mail/mail-session=java\:jboss\/mail\/test1439373303651:add(jndi-name=java\:jboss\/mail\/test1439373303651)
{"outcome" => "success"}

 /subsystem=mail/mail-session=java\:jboss\/mail\/test1439373303651:read-children-names(child-type=server)
{
    "outcome" => "success",
    "result" => []
}
[standalone@localhost:9990 /] /subsystem=mail/mail-session=java\:jboss\/mail\/test1439373303651/server=smtp:remove
{
    "outcome" => "success",
    "response-headers" => {
        "operation-requires-reload" => true,
        "process-state" => "reload-required"
    }
}

/subsystem=mail/mail-session=java\:jboss\/mail\/test1439373303651/server=xxx:remove
{
    "outcome" => "failed",
    "failure-description" => "WFLYCTL0030: No resource definition is registered for address [
    (\"subsystem\" => \"mail\"),
    (\"mail-session\" => \"java:jboss/mail/test1439373303651\"),
    (\"server\" => \"xxx\")
]",
    "rolled-back" => true,
    "response-headers" => {"process-state" => "reload-required"}
}