From 393b842adc4099747d3a08cf5513fac67bbcf63a Mon Sep 17 00:00:00 2001
From: Manuel Kaufmann <humitos@gmail.com>
Date: Mon, 30 Mar 2020 15:48:47 +0200
Subject: [PATCH] Allow receiving `None` for `template_html` when sending
 emails

We are using this internally and we haven't receiving emails in the
last month or so. I suppose this started happening after the Django
2.2 migration.
---
 readthedocs/core/tasks.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/readthedocs/core/tasks.py b/readthedocs/core/tasks.py
index 7c1b86f477f..6969b619e0a 100644
--- a/readthedocs/core/tasks.py
+++ b/readthedocs/core/tasks.py
@@ -56,7 +56,8 @@ def send_email_task(
             get_template(template_html).render(context),
             'text/html',
         )
-    except TemplateDoesNotExist:
+    except (TypeError, TemplateDoesNotExist):
+        # TypeError is raised when ``template_html`` is ``None``
         pass
     msg.send()
     log.info('Sent email to recipient: %s', recipient)