diff --git a/seahub/contacts/models.py b/seahub/contacts/models.py
index 3b55b9b7ba..f28a2cc4f4 100644
--- a/seahub/contacts/models.py
+++ b/seahub/contacts/models.py
@@ -4,6 +4,8 @@ from django.db import models
 from django.forms import ModelForm
 from django.utils.translation import ugettext as _
 
+from seaserv import ccnet_threaded_rpc
+
 from seahub.base.fields import LowerCaseCharField
 from settings import CONTACT_EMAIL_LENGTH
 
@@ -25,11 +27,16 @@ class ContactManager(models.Manager):
 
     def get_registered_contacts_by_user(self, user_email):
         """Get a user's registered contacts.
-        """
-        from seahub.views import is_registered_user
 
-        return [ c for c in super(ContactManager, self).filter(
-                user_email=user_email) if is_registered_user(c.contact_email) ]
+        Returns:
+            A list contains contact emails.
+        """
+        contacts = [ c.contact_email for c in super(
+                ContactManager, self).filter(user_email=user_email) ]
+        emailusers = ccnet_threaded_rpc.filter_emailusers_by_emails(
+            ','.join(contacts))
+
+        return [ e.email for e in emailusers ]
 
 class Contact(models.Model):
     """Record user's contacts."""
diff --git a/seahub/templates/snippets/myhome_extra_script.html b/seahub/templates/snippets/myhome_extra_script.html
index 1e9c55b9da..d29da1746c 100644
--- a/seahub/templates/snippets/myhome_extra_script.html
+++ b/seahub/templates/snippets/myhome_extra_script.html
@@ -1,8 +1,8 @@
 {% load seahub_tags avatar_tags i18n %}
     //repo-share-form share-list autocomplete
     var share_list = [], contact_email, group_name, group_name_py;
-    {% for contact in contacts %}
-    contact_email = '{{ contact.contact_email }}';
+    {% for contact_email in contacts %}
+    contact_email = '{{ contact_email }}';
     share_list.push({value:contact_email, label:contact_email});
     {% endfor %}
     
diff --git a/seahub/templates/snippets/repo_share_form.html b/seahub/templates/snippets/repo_share_form.html
index b67f7024f9..b6e5bbe3be 100644
--- a/seahub/templates/snippets/repo_share_form.html
+++ b/seahub/templates/snippets/repo_share_form.html
@@ -31,11 +31,11 @@
         </div>
         <div id="share-contact-options" class="hide">
             <ul class="option-list">
-            {% for contact in contacts %}
+            {% for contact_email in contacts %}
             <li>
             <label class="checkbox-label">
-                <span class="checkbox"><input type="checkbox" name="contact" value="{{ contact.contact_email }}" class="checkbox-orig" /></span>
-                {% avatar contact.contact_email 20 %} <span class="checkbox-option">{{ contact.contact_email }}</span>
+                <span class="checkbox"><input type="checkbox" name="contact" value="{{ contact_email }}" class="checkbox-orig" /></span>
+                {% avatar contact_email 20 %} <span class="checkbox-option">{{ contact_email }}</span>
             </label>
             </li>
             {% endfor %}