diff --git a/frappe/core/doctype/doctype/doctype.py b/frappe/core/doctype/doctype/doctype.py
index 9a4b09b24b..a60acaaeb8 100644
--- a/frappe/core/doctype/doctype/doctype.py
+++ b/frappe/core/doctype/doctype/doctype.py
@@ -1148,7 +1148,7 @@ def clear_linked_doctype_cache():
 	frappe.cache().delete_value('linked_doctypes_without_ignore_user_permissions_enabled')
 
 def check_email_append_to(doc):
-	if not doc.email_append_to:
+	if not hasattr(doc, "email_append_to") or not doc.email_append_to:
 		return
 
 	# Subject Field
diff --git a/frappe/desk/doctype/event/event.json b/frappe/desk/doctype/event/event.json
index 59ba7689db..5768f00f32 100644
--- a/frappe/desk/doctype/event/event.json
+++ b/frappe/desk/doctype/event/event.json
@@ -270,13 +270,14 @@
    "fieldname": "sender",
    "fieldtype": "Data",
    "label": "Sender",
+   "options": "Email",
    "read_only": 1
   }
  ],
  "icon": "fa fa-calendar",
  "idx": 1,
  "links": [],
- "modified": "2019-12-27 14:45:51.332025",
+ "modified": "2020-01-14 21:47:15.825287",
  "modified_by": "Administrator",
  "module": "Desk",
  "name": "Event",