def __init__(self):
        self._mailboxes = collections.defaultdict(list)
        self._mails = []
Tests that a SaltCloudSystemExit is raised when something other than
dataset/ETHPy150Open bloomberg/phabricator-tools/py/phl/phlmail_mocksender.py/MailSender.__init__--crossover with--dataset/ETHPy150Open saltstack/salt/tests/unit/cloud/clouds/opennebula_test.py/OpenNebulaTestCase.test_vm_disk_snapshot_revert_action_error