Reply to a Phrabicator mail using a simple signed PGP/MIME mail results in this message:
`Your email to Phabricator was not processed, because an error occurred while
trying to handle it:
PhabricatorDataNotAttachedException: Attempting to access attached data on
PhabricatorUser (via getUserSetting()), but the data is not actually attached.
Before accessing attachable data on an object, you must load and attach it.
Data is normally attached by calling the corresponding needX() method on the
Query class when the object is loaded. You can also call the corresponding
attachX() method explicitly.