diff --git a/notifications/models.py b/notifications/models.py
index 7ec9c35e5c..7e0dff14ed 100644
--- a/notifications/models.py
+++ b/notifications/models.py
@@ -1,3 +1,4 @@
+import datetime
 from django.db import models
 from django.forms import ModelForm, Textarea
 
@@ -9,6 +10,7 @@ class UserNotification(models.Model):
     to_user = models.EmailField(db_index=True, max_length=255)
     msg_type = models.CharField(db_index=True, max_length=30)
     detail = models.TextField()
+    timestamp = models.DateTimeField(default=datetime.datetime.now)
     
 class NotificationForm(ModelForm):
     """
diff --git a/tools/user_notification.py b/tools/user_notification.py
index ed33e0f7f3..26f16cebf7 100755
--- a/tools/user_notification.py
+++ b/tools/user_notification.py
@@ -1,6 +1,7 @@
 #!/usr/bin/python
 # encoding: utf-8
 
+from datetime import datetime
 import string
 from django.core.mail import send_mail
 
@@ -17,6 +18,7 @@ ${msg_url}
 Seafile团队
 '''
 
+today = datetime.now()
 subject = u'SeaCloud：新消息'
 url = 'http://localhost:8000/home/my/'
 
@@ -24,6 +26,9 @@ notifications = UserNotification.objects.all()
 
 d = {}
 for e in notifications:
+    if today.year != e.timestamp.year or today.month != e.timestamp.month or \
+            today.day != e.timestamp.day:
+        continue
     if d.has_key(e.to_user):
         d[e.to_user] += 1
     else:
@@ -32,7 +37,7 @@ for e in notifications:
 for k in d.keys():
     to_user = k
     cnt = d[k]
-
+ 
     template = string.Template(email_template)
     content = template.substitute(username=to_user, cnt=cnt, msg_url=url)
     send_mail(subject, content, settings.DEFAULT_FROM_EMAIL, [to_user], \