diff --git a/ietf/message/migrations/0009_fix_address_lists.py b/ietf/message/migrations/0009_fix_address_lists.py
new file mode 100644
index 000000000..736225da8
--- /dev/null
+++ b/ietf/message/migrations/0009_fix_address_lists.py
@@ -0,0 +1,43 @@
+# Copyright The IETF Trust 2020, All Rights Reserved
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.20 on 2019-05-21 14:27
+
+
+from __future__ import absolute_import, print_function, unicode_literals
+
+from tqdm import tqdm
+
+from django.db import migrations
+
+import debug                            # pyflakes:ignore
+
+
+def forward(apps, schema_editor):
+
+    Message                     = apps.get_model('message', 'Message')
+
+    for m in tqdm(Message.objects.all()):
+        dirty = False
+        for fieldname in ['to', 'cc', 'bcc', ]:
+            f = getattr(m, fieldname)
+            if f.startswith("['") or f.startswith('[]') or f.startswith("[u'"):
+                l = eval(f)
+                if isinstance(l, list):
+                    f = ','.join(l)
+                    setattr(m, fieldname, f)
+                    dirty = True
+        if dirty:
+            m.save()
+
+def reverse(apps, schema_editor):
+    pass
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('message', '0008_set_message_sent'),
+    ]
+
+    operations = [
+        migrations.RunPython(forward, reverse),
+    ]