Fixed #7747: Altered EmailMessage such that messages with long subject lines don't use tabs in their continutation sequence. Tabs in subjects cause problems with Outlook and Thunderbird. Thanks to Mark Allison <mark.allison@maplecroft.com> for the report and fix.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8483 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/mail.py

@@ -86,6 +86,9 @@ def forbid_multi_line_headers(name, val):
             val = ', '.join(result)
         else:
             val = Header(val, settings.DEFAULT_CHARSET)
+    else:
+        if name.lower() == 'subject':
+            val = Header(val)
     return name, val
 
 class SafeMIMEText(MIMEText):