ctxProp:
  mail:
    relay:
      host: "{{ mail.server.host | default('smtp-relay.gmail.com') }}"
      port: "{{ mail.server.port | default('587') }}"
      tls:  "{{ mail.server.tls  | default('true') }}"
      auth: "{{ mail.server.auth | default('false') }}"
      user: "{{ mail.server.user | default('user') }}"
      pass: "{{ mail.server.pass | default('pass') }}"

failed: [<host>] <...> u'relay': {u'tls': u"{{ mail.server.tls  | default('true') }}", u'auth': u"{{ mail.server.auth | default('false') }}", u'host': u"{{ mail.server.host | default('smtp-relay.gmail.com') }}", u'user': u"{{ mail.server.user | default('') }}", u'pass': u"{{ mail.server.pass | default('') }}", u'port': u"{{ mail.server.port | default('587') }}"}}}: 'mail' is undefined"}