From f19284b85aed37fd4008c56f1aa7a36517305e54 Mon Sep 17 00:00:00 2001
From: Adrian Holovaty <adrian@holovaty.com>
Date: Tue, 8 Jul 2008 01:56:01 +0000
Subject: [PATCH] Fixed #7655 -- Added two assertions to mail.py to help people
 debug a common problem (sending strings instead of lists/tuples for 'to' or
 'bcc'). Thanks, guettli

git-svn-id: http://code.djangoproject.com/svn/django/trunk@7864 bcc190cf-cafb-0310-a4f2-bffc1f526a37
---
 django/core/mail.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/django/core/mail.py b/django/core/mail.py
index bf48dcb882..b60757366f 100644
--- a/django/core/mail.py
+++ b/django/core/mail.py
@@ -205,10 +205,12 @@ class EmailMessage(object):
         conversions.
         """
         if to:
+            assert not isinstance(to, basestring), '"to" argument must be a list or tuple'
             self.to = list(to)
         else:
             self.to = []
         if bcc:
+            assert not isinstance(bcc, basestring), '"bcc" argument must be a list or tuple'
             self.bcc = list(bcc)
         else:
             self.bcc = []