diff --git a/trytond/trytond/ir/email_.py b/trytond/trytond/ir/email_.py
index 66c4bc9166..767093cddc 100644
--- a/trytond/trytond/ir/email_.py
+++ b/trytond/trytond/ir/email_.py
@@ -191,12 +191,13 @@ class Email(ResourceAccessMixin, ModelSQL, ModelView):
             body=body,
             resource=record)
         email.save()
-        with Transaction().set_context(_check_access=False):
-            attachments_ = []
-            for name, data in files:
-                attachments_.append(
-                    Attachment(resource=email, name=name, data=data))
-            Attachment.save(attachments_)
+        if files:
+            with Transaction().set_context(_check_access=False):
+                attachments_ = []
+                for name, data in files:
+                    attachments_.append(
+                        Attachment(resource=email, name=name, data=data))
+                Attachment.save(attachments_)
         return email
 
     @classmethod