diff --git a/seahub/base/accounts.py b/seahub/base/accounts.py
index 10d2f9aaf8..0966bb9ef8 100644
--- a/seahub/base/accounts.py
+++ b/seahub/base/accounts.py
@@ -278,11 +278,17 @@ class User(object):
     @property
     def contact_email(self):
         if not hasattr(self, '_cached_contact_email'):
-            email = Profile.objects.get_contact_email_by_user(self.username)
-            self._cached_contact_email = email
+            self._cached_contact_email = email2contact_email(self.username)
 
         return self._cached_contact_email
 
+    @property
+    def name(self):
+        if not hasattr(self, '_cached_nickname'):
+            self._cached_nickname = email2nickname(self.username)
+
+        return self._cached_nickname
+
     class DoesNotExist(Exception):
         pass
 
@@ -842,3 +848,7 @@ class DetailedRegistrationForm(RegistrationForm):
     note = forms.CharField(widget=forms.TextInput(
             attrs=dict(attrs_dict, maxlength=100)), label=_("note"),
                            required=note_required)
+
+# Move here to avoid circular import
+from seahub.base.templatetags.seahub_tags import email2nickname, \
+    email2contact_email
diff --git a/seahub/views/sysadmin.py b/seahub/views/sysadmin.py
index 78ccbd4c9f..892cc1275a 100644
--- a/seahub/views/sysadmin.py
+++ b/seahub/views/sysadmin.py
@@ -32,7 +32,8 @@ from seahub.base.accounts import User
 from seahub.base.models import UserLastLogin
 from seahub.base.decorators import sys_staff_required, require_POST
 from seahub.base.sudo_mode import update_sudo_mode_ts
-from seahub.base.templatetags.seahub_tags import tsstr_sec, email2nickname
+from seahub.base.templatetags.seahub_tags import tsstr_sec, email2nickname, \
+    email2contact_email
 from seahub.auth import authenticate
 from seahub.auth.decorators import login_required, login_required_ajax
 from seahub.constants import GUEST_USER, DEFAULT_USER, DEFAULT_ADMIN, \
@@ -226,13 +227,8 @@ def can_view_sys_admin_repo(repo):
 def populate_user_info(user):
     """Populate contact email and name to user.
     """
-    user_profile = Profile.objects.get_profile_by_user(user.email)
-    if user_profile:
-        user.contact_email = user_profile.contact_email
-        user.name = user_profile.nickname
-    else:
-        user.contact_email = ''
-        user.name = ''
+    user.contact_email = email2contact_email(user.email)
+    user.name = email2nickname(user.email)
 
 def _populate_user_quota_usage(user):
     """Populate space/share quota to user.