diff --git a/ietf/group/views.py b/ietf/group/views.py
index 071f74cb8..75a563299 100644
--- a/ietf/group/views.py
+++ b/ietf/group/views.py
@@ -1586,7 +1586,7 @@ def email_open_review_assignments(request, acronym, group_type=None):
     if request.method == "POST" and request.POST.get("action") == "email":
         form = EmailOpenAssignmentsForm(request.POST)
         if form.is_valid():
-            send_mail_text(request, form.cleaned_data["to"], form.cleaned_data["frm"], form.cleaned_data["subject"], form.cleaned_data["body"],cc=form.cleaned_data["cc"],extra={"Reply-to":", ".join(form.cleaned_data["reply_to"])})
+            send_mail_text(request, form.cleaned_data["to"], form.cleaned_data["frm"], form.cleaned_data["subject"], form.cleaned_data["body"],cc=form.cleaned_data["cc"],extra={"Reply-To":", ".join(form.cleaned_data["reply_to"])})
             return HttpResponseRedirect(back_url)
     else:
         (to,cc) = gather_address_lists('review_assignments_summarized',group=group)
diff --git a/ietf/message/utils.py b/ietf/message/utils.py
index b956e8ee5..c843f1584 100644
--- a/ietf/message/utils.py
+++ b/ietf/message/utils.py
@@ -14,7 +14,7 @@ def infer_message(s):
     m.to = parsed.get("To", "").decode("utf-8")
     m.cc = parsed.get("Cc", "").decode("utf-8")
     m.bcc = parsed.get("Bcc", "").decode("utf-8")
-    m.reply_to = parsed.get("Reply-to", "").decode("utf-8")
+    m.reply_to = parsed.get("Reply-To", "").decode("utf-8")
     m.body = parsed.get_payload().decode("utf-8")
 
     return m
diff --git a/ietf/submit/mail.py b/ietf/submit/mail.py
index 505459566..181f39349 100644
--- a/ietf/submit/mail.py
+++ b/ietf/submit/mail.py
@@ -105,6 +105,8 @@ def announce_to_lists(request, submission):
     m.subject = 'I-D Action: %s-%s.txt' % (submission.name, submission.rev)
     m.frm = settings.IDSUBMIT_ANNOUNCE_FROM_EMAIL
     (m.to, m.cc) = gather_address_lists('sub_announced',submission=submission)
+    if m.cc:
+        m.reply_to = m.cc
     m.body = render_to_string('submit/announce_to_lists.txt',
                               dict(submission=submission,
                                    settings=settings))
diff --git a/ietf/submit/tests.py b/ietf/submit/tests.py
index 9470e3d86..b509c7b6d 100644
--- a/ietf/submit/tests.py
+++ b/ietf/submit/tests.py
@@ -1501,8 +1501,8 @@ Thank you
         outmsg = outbox[0]
         self.assertTrue(to in outmsg['To'])
         
-        reply_to = outmsg['Reply-to']
-        self.assertIsNotNone(reply_to, "Expected Reply-to")
+        reply_to = outmsg['Reply-To']
+        self.assertIsNotNone(reply_to, "Expected Reply-To")
         
         # Build a reply
 
diff --git a/ietf/utils/mail.py b/ietf/utils/mail.py
index 9e01ab835..83f5cb07f 100644
--- a/ietf/utils/mail.py
+++ b/ietf/utils/mail.py
@@ -206,6 +206,11 @@ def condition_message(to, frm, subject, msg, cc, extra):
         cc = ", ".join([isinstance(addr, tuple) and formataddr(addr) or addr for addr in cc if addr])
     if frm:
 	msg['From'] = frm
+    if extra and 'Reply-To' in extra:
+        reply_to = extra['Reply-To']
+        if isinstance(reply_to, list) or isinstance(reply_to, tuple):
+            reply_to = ", ".join([isinstance(addr, tuple) and formataddr(addr) or addr for addr in reply_to if addr])
+        extra['Reply-To'] = reply_to
 
     # The following is a hack to avoid an issue with how the email module (as of version 4.0.3)
     # breaks lines when encoding header fields with anything other than the us-ascii codec.
@@ -265,7 +270,7 @@ def send_mail_mime(request, to, frm, subject, msg, cc=None, extra=None, toUser=F
 
     if test_mode or debugging or settings.SERVER_MODE == 'production':
         try:
-            send_smtp(msg,bcc)
+            send_smtp(msg, bcc)
         except smtplib.SMTPException as e:
             log_smtp_exception(e)
             build_warning_message(request, e)
@@ -339,7 +344,7 @@ def send_mail_message(request, message, extra={}):
 
     e = extra.copy()
     if message.reply_to:
-        e['Reply-to'] = message.reply_to
+        e['Reply-To'] = message.reply_to
     if message.msgid:
         e['Message-ID'] = message.msgid