diff --git a/djrill/mail/backends/djrill.py b/djrill/mail/backends/djrill.py
index 754d773..4b39067 100644
--- a/djrill/mail/backends/djrill.py
+++ b/djrill/mail/backends/djrill.py
@@ -145,7 +145,9 @@ class DjrillBackend(BaseEmailBackend):
         # Mandrill attributes that can be copied directly:
         mandrill_attrs = [
             'from_name', # overrides display name parsed from from_email above
-            'track_opens', 'track_clicks', 'auto_text', 'inline_css', 'url_strip_qs',
+            'track_opens', 'track_clicks', 'auto_text', 'auto_html',
+            'inline_css', 'url_strip_qs',
+            'tracking_domain', 'signing_domain',
             'tags', 'preserve_recipients',
             'google_analytics_domains', 'google_analytics_campaign',
             'metadata']
diff --git a/djrill/tests/test_mandrill_send.py b/djrill/tests/test_mandrill_send.py
index ab309c1..b367830 100644
--- a/djrill/tests/test_mandrill_send.py
+++ b/djrill/tests/test_mandrill_send.py
@@ -296,13 +296,19 @@ class DjrillMandrillFeatureTests(DjrillBackendMockAPITestCase):
 
     def test_message_options(self):
         self.message.auto_text = True
+        self.message.auto_html = True
         self.message.inline_css = True
         self.message.preserve_recipients = True
+        self.message.tracking_domain = "click.example.com"
+        self.message.signing_domain = "example.com"
         self.message.send()
         data = self.get_api_call_data()
         self.assertEqual(data['message']['auto_text'], True)
+        self.assertEqual(data['message']['auto_html'], True)
         self.assertEqual(data['message']['inline_css'], True)
         self.assertEqual(data['message']['preserve_recipients'], True)
+        self.assertEqual(data['message']['tracking_domain'], "click.example.com")
+        self.assertEqual(data['message']['signing_domain'], "example.com")
 
     def test_merge(self):
         # Djrill expands simple python dicts into the more-verbose name/content
@@ -377,10 +383,13 @@ class DjrillMandrillFeatureTests(DjrillBackendMockAPITestCase):
         self.assertFalse('track_opens' in data['message'])
         self.assertFalse('track_clicks' in data['message'])
         self.assertFalse('auto_text' in data['message'])
+        self.assertFalse('auto_html' in data['message'])
         self.assertFalse('inline_css' in data['message'])
         self.assertFalse('url_strip_qs' in data['message'])
         self.assertFalse('tags' in data['message'])
         self.assertFalse('preserve_recipients' in data['message'])
+        self.assertFalse('tracking_domain' in data['message'])
+        self.assertFalse('signing_domain' in data['message'])
         self.assertFalse('google_analytics_domains' in data['message'])
         self.assertFalse('google_analytics_campaign' in data['message'])
         self.assertFalse('metadata' in data['message'])
diff --git a/docs/history.rst b/docs/history.rst
index 5373f35..e5ecf39 100644
--- a/docs/history.rst
+++ b/docs/history.rst
@@ -1,6 +1,12 @@
 Release Notes
 =============
 
+Version 0.5 (development):
+
+* Support for Mandrill send options :attr:`auto_html`, :attr:`tracking_domain`
+  and :attr:`signing_domain`.
+
+
 Version 0.4:
 
 * Attachments with a Content-ID are now treated as
diff --git a/docs/usage/sending_mail.rst b/docs/usage/sending_mail.rst
index 5318468..cc21ab6 100644
--- a/docs/usage/sending_mail.rst
+++ b/docs/usage/sending_mail.rst
@@ -109,6 +109,8 @@ Most of the options from the Mandrill
 `message` struct can be set directly on an :class:`~django.core.mail.EmailMessage`
 (or subclass) object:
 
+.. These attributes are in the same order as they appear in the Mandrill API docs...
+
 .. attribute:: track_opens
 
     ``Boolean``: whether Mandrill should enable open-tracking for this message.
@@ -132,6 +134,11 @@ Most of the options from the Mandrill
     ``Boolean``: whether Mandrill should automatically generate a text body from the HTML.
     Default from your Mandrill account settings.
 
+.. attribute:: auto_html
+
+    ``Boolean``: whether Mandrill should automatically generate an HTML body from the plaintext.
+    Default from your Mandrill account settings.
+
 .. attribute:: inline_css
 
     ``Boolean``: whether Mandrill should inline CSS styles in the HTML.
@@ -149,6 +156,18 @@ Most of the options from the Mandrill
     ``Boolean``: whether Mandrill should include all recipients in the "to" message header.
     Default from your Mandrill account settings.
 
+.. attribute:: tracking_domain
+
+    ``str``: domain Mandrill should use to rewrite tracked links and host tracking pixels
+    for this message. Useful if you send email from multiple domains.
+    Default from your Mandrill account settings.
+
+.. attribute:: signing_domain
+
+    ``str``: domain Mandrill should for DKIM signing and SPF on this message.
+    Useful if you send email from multiple domains.
+    Default from your Mandrill account settings.
+
 .. attribute:: global_merge_vars
 
     ``dict``: merge variables to use for all recipients (most useful with :ref:`mandrill-templates`). ::