diff --git a/addons/mail/static/src/css/mail.css b/addons/mail/static/src/css/mail.css
index 821b7468802..49d88776572 100644
--- a/addons/mail/static/src/css/mail.css
+++ b/addons/mail/static/src/css/mail.css
@@ -410,5 +410,5 @@
 
 .openerp .oe_mail_wall .oe_mail{
     margin: 16px;
-    width: 720px;
+    width: 600px;
 }