diff --git a/modoboa/extensions/admin/__init__.py b/modoboa/extensions/admin/__init__.py
index 0c03630a8..acab3ea18 100644
--- a/modoboa/extensions/admin/__init__.py
+++ b/modoboa/extensions/admin/__init__.py
@@ -208,7 +208,8 @@ def account_auto_created(user):
     try:
         domain = Domain.objects.get(name=domname)
     except Domain.DoesNotExist:
-        label = check_if_domain_exists(domname)
+        label = check_if_domain_exists(
+            domname, [(DomainAlias, _('domain alias'))])
         if label is not None:
             return
         domain = Domain(name=domname, enabled=True, quota=0)
diff --git a/modoboa/extensions/admin/forms/domain.py b/modoboa/extensions/admin/forms/domain.py
index c38a95f2d..f19742377 100644
--- a/modoboa/extensions/admin/forms/domain.py
+++ b/modoboa/extensions/admin/forms/domain.py
@@ -72,7 +72,7 @@ class DomainFormGeneral(forms.ModelForm, DynamicForm):
 
         cleaned_data = self.cleaned_data
         name = cleaned_data["name"]
-        label = check_if_domain_exists(name)
+        label = check_if_domain_exists(name, [(DomainAlias, _('domain alias'))])
         if label is not None:
             self._errors["name"] = self.error_class(
                 [_("A %s with this name already exists" % unicode(label))]
@@ -85,16 +85,14 @@ class DomainFormGeneral(forms.ModelForm, DynamicForm):
             if cleaned_data[k] == "":
                 del cleaned_data[k]
                 continue
-            for dtype, label in [(Domain, _('domain'))] + dtypes:
-                try:
-                    dtype.objects.get(name=cleaned_data[k])
-                except dtype.DoesNotExist:
-                    continue
+            label = check_if_domain_exists(
+                cleaned_data[k], [(Domain, _('domain'))])
+            if label is not None:
                 self._errors[k] = self.error_class(
                     [_("A %s with this name already exists" % unicode(label))]
                 )
                 del cleaned_data[k]
-                break
+
         return cleaned_data
 
     def update_mailbox_quotas(self, domain):
diff --git a/modoboa/extensions/admin/lib.py b/modoboa/extensions/admin/lib.py
index 269ae48af..d1634f69f 100644
--- a/modoboa/extensions/admin/lib.py
+++ b/modoboa/extensions/admin/lib.py
@@ -139,7 +139,7 @@ def get_domains(user, domfilter=None, searchquery=None, **extrafilters):
     return chain(domains, extra_domain_entries)
 
 
-def check_if_domain_exists(name):
+def check_if_domain_exists(name, extra_checks=None):
     """Check if a domain already exists.
 
     We not only look for domains, we also look for every object that
@@ -147,7 +147,9 @@ def check_if_domain_exists(name):
 
     """
     dtypes = events.raiseQueryEvent('CheckDomainName')
-    for dtype, label in [(DomainAlias, _('domain alias'))] + dtypes:
+    if extra_checks is not None:
+        dtypes = extra_checks + dtypes
+    for dtype, label in dtypes:
         try:
             dtype.objects.get(name=name)
         except dtype.DoesNotExist: