Fixed #28912 -- Made EmailMessage.message() omit an empty To header.

1 files changed, 4 insertions, 0 deletions

diff --git a/tests/mail/tests.py b/tests/mail/tests.py
index c7b8d09027..68a15311dc 100644
--- a/tests/mail/tests.py
+++ b/tests/mail/tests.py
@@ -85,6 +85,10 @@ class MailTests(HeadersCheckMixin, SimpleTestCase):
         self.assertEqual(message['From'], 'from@example.com')
         self.assertEqual(message['To'], 'to@example.com, other@example.com')
 
+    def test_header_omitted_for_no_to_recipients(self):
+        message = EmailMessage('Subject', 'Content', 'from@example.com', cc=['cc@example.com']).message()
+        self.assertNotIn('To', message)
+
     def test_recipients_with_empty_strings(self):
         """
         Empty strings in various recipient arguments are always stripped