Add email backend that behaves like in Django 3.2

src/argus/workarounds.py

@@ -0,0 +1,21 @@
+import ssl
+
+from django.core.mail.backends.smtp import EmailBackend as SMTPBackend
+from django.utils.functional import cached_property
+
+
+__all__ = ["OldStyleEmailBackend"]
+
+
+class OldStyleEmailBackend(SMTPBackend):
+    @cached_property
+    def ssl_context(self):
+        if self.ssl_certfile or self.ssl_keyfile:
+            ssl_context = ssl.SSLContext(protocol=ssl.PROTOCOL_TLS_CLIENT)
+            ssl_context.load_cert_chain(self.ssl_certfile, self.ssl_keyfile)
+            return ssl_context
+        else:
+            ssl_context = ssl.create_default_context()
+            ssl_context.check_hostname = False
+            ssl_context.verify_mode = ssl.CERT_NONE
+            return ssl_context