diff --git a/birdsong/backends/__init__.py b/birdsong/backends/__init__.py
index 5e56fd8..9c2279f 100644
--- a/birdsong/backends/__init__.py
+++ b/birdsong/backends/__init__.py
@@ -8,4 +8,8 @@ class BaseEmailBackend:
     def from_email(self):
         if hasattr(settings, 'BIRDSONG_FROM_EMAIL'):
             return settings.BIRDSONG_FROM_EMAIL
-        return settings.DEFAULT_FROM_EMAIL
\ No newline at end of file
+        return settings.DEFAULT_FROM_EMAIL
+
+    @property
+    def reply_to(self):
+        return getattr(settings, 'BIRDSONG_REPLY_TO', self.from_email)
\ No newline at end of file
diff --git a/birdsong/backends/smtp.py b/birdsong/backends/smtp.py
index ac33f28..f86c034 100644
--- a/birdsong/backends/smtp.py
+++ b/birdsong/backends/smtp.py
@@ -17,10 +17,16 @@ class SMTPEmailBackend(BaseEmailBackend):
                 campaign.get_template(request),
                 campaign.get_context(request, contact),
             )
-            messages.append((subject, content, self.from_email, [contact.email]))
+            messages.append({
+                'subject': subject,
+                'body': content,
+                'from_email': self.from_email,
+                'to': [contact.email],
+                'reply_to': [self.reply_to],
+            })
 
         try:
-            send_mass_html_mail(tuple(messages))
+            send_mass_html_mail(messages)
             success = True
         except SMTPException as e:
             success = False
diff --git a/birdsong/utils.py b/birdsong/utils.py
index 57a38e7..b3b5164 100644
--- a/birdsong/utils.py
+++ b/birdsong/utils.py
@@ -1,7 +1,7 @@
 from django.core.mail import EmailMultiAlternatives, get_connection
 
 
-def send_mass_html_mail(datatuple, fail_silently=False, auth_user=None,
+def send_mass_html_mail(email_data, fail_silently=False, auth_user=None,
                         auth_password=None, connection=None):
     """
     Modified version of send_mass_mail to allow html email
@@ -12,10 +12,10 @@ def send_mass_html_mail(datatuple, fail_silently=False, auth_user=None,
         fail_silently=fail_silently,
     )
 
-    def _email_from_tuple(tuple):
-        msg = EmailMultiAlternatives(*tuple, connection=connection)
-        msg.attach_alternative(tuple[1], "text/html")
+    def _email_from_dict(data):
+        msg = EmailMultiAlternatives(connection=connection, **data)
+        msg.attach_alternative(data['body'], "text/html")
         return msg
 
-    messages = [_email_from_tuple(m) for m in datatuple]
+    messages = [_email_from_dict(d) for d in email_data]
     return connection.send_messages(messages)