ability to use default Mandrill subject and from fields

djrill/mail/backends/djrill.py

@@ -87,6 +87,7 @@ class DjrillBackend(BaseEmailBackend):
             if getattr(message, 'alternatives', None):
                 self._add_alternatives(message, msg_dict)
             self._add_attachments(message, msg_dict)
+            self._filter_msg_dict(message, msg_dict)
             api_params['message'] = msg_dict
 
             # check if template is set in message to send it via
@@ -310,3 +311,10 @@ class DjrillBackend(BaseEmailBackend):
             'content': content_b64.decode('ascii'),
         }
         return mandrill_attachment, is_embedded_image
+
+    def _filter_msg_dict(self, message, msg_dict):
+        if hasattr(message, 'clear_from') and message.clear_from:
+            msg_dict['from_name'] = ''
+            msg_dict['from_email'] = ''
+        if hasattr(message, 'clear_subject') and message.clear_subject:
+            msg_dict['subject'] = ''

docs/usage/templates.rst

@@ -37,6 +37,26 @@ and will ignore any `body` text set on the `EmailMessage`.
 All of Djrill's other :ref:`Mandrill-specific options <mandrill-send-support>`
 can be used with templates.
 
+How To Use Default Mandrill Subject and From fields
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.. versionadded:: dev
+   Mandrill default fields support
+
+To use default *Mandril* subject or default from field you need send message
+to *Mandril* with empty subject or empty from field. This can be done using
+the following attrs: :attr:`clear_subject` and :attr:`clear_from` on
+your :class:`~django.core.mail.EmailMessage` object::
+    # ...
+    msg.clear_subject = True
+    msg.clear_from = True
+    msg.send()
+
+If :attr:`clear_subject` is set, Djrill will send message without subject and
+Mandrill will use default subject.
+
+If :attr:`clear_from` is set, Djrill will send message without from field and
+Mandrill will use default from field.
+
 
 .. _django-templates: