diff --git a/mail_sent/models.py b/mail_sent/models.py
index 16414ed..e7c3995 100644
--- a/mail_sent/models.py
+++ b/mail_sent/models.py
@@ -16,6 +16,15 @@ class MailMessage(models.Model):
                          and self_sudo.author_id \
                          and self_sudo.partner_ids[0].id != self_sudo.author_id.id
 
+    @api.multi
+    def message_format(self):
+        message_values = super(MailMessage, self).message_format()
+        for message in message_values:
+            for item in self:
+                if message['id'] == item.id:
+                    message['sent'] = item.sent
+        return message_values
+
 
 class MailComposeMessage(models.TransientModel):
     _inherit = 'mail.compose.message'
diff --git a/mail_sent/static/src/js/sent.js b/mail_sent/static/src/js/sent.js
index 8b1d0d6..cd576fb 100644
--- a/mail_sent/static/src/js/sent.js
+++ b/mail_sent/static/src/js/sent.js
@@ -26,7 +26,7 @@ base_obj.MailTools.include({
 
     set_channel_flags: function(data, msg){
         this._super.apply(this, arguments);
-        if (_.contains(data.author_id, session.partner_id) && data.partner_ids.length > 0) {
+        if (data.sent) {
             msg.is_sent = true;
         }
         return msg;