diff --git a/modoboa/admin/models/alias.py b/modoboa/admin/models/alias.py
index 2d14bbda2..0c3223d18 100644
--- a/modoboa/admin/models/alias.py
+++ b/modoboa/admin/models/alias.py
@@ -187,7 +187,7 @@ class Alias(AdminObject):
             raise Conflict
         self.address = address
         self.domain = domain
-        self.enabled = (row[2].strip() in ["True", "1", "yes", "y"])
+        self.enabled = (row[2].strip().lower() in ["true", "1", "yes", "y"])
         self.save()
         self.set_recipients([raddress.strip() for raddress in row[3:]])
         self.post_create(user)
diff --git a/modoboa/admin/models/domain.py b/modoboa/admin/models/domain.py
index e580fddae..16a59ab6d 100644
--- a/modoboa/admin/models/domain.py
+++ b/modoboa/admin/models/domain.py
@@ -269,7 +269,7 @@ class Domain(AdminObject):
                 _("Default mailbox quota cannot be greater than domain "
                   "quota")
             )
-        self.enabled = (row[4].strip() in ["True", "1", "yes", "y"])
+        self.enabled = (row[4].strip().lower() in ["true", "1", "yes", "y"])
         core_signals.can_create_object.send(
             sender=self.__class__, context=user, klass=Domain,
             instance=self)
diff --git a/modoboa/admin/models/domain_alias.py b/modoboa/admin/models/domain_alias.py
index 92dbba536..516be06fc 100644
--- a/modoboa/admin/models/domain_alias.py
+++ b/modoboa/admin/models/domain_alias.py
@@ -80,7 +80,7 @@ class DomainAlias(AdminObject):
             raise BadRequest(_("Unknown domain %s") % domname)
         core_signals.can_create_object.send(
             sender="import", context=self.target, object_type="domain_aliases")
-        self.enabled = row[3].strip() in ["True", "1", "yes", "y"]
+        self.enabled = row[3].strip().lower() in ["true", "1", "yes", "y"]
         self.save(creator=user)
 
     def to_csv(self, csvwriter):
diff --git a/modoboa/core/models.py b/modoboa/core/models.py
index 648fc93a9..7d815c1c8 100644
--- a/modoboa/core/models.py
+++ b/modoboa/core/models.py
@@ -392,7 +392,7 @@ class User(PermissionsMixin):
             self.password = row[2].strip()
         self.first_name = row[3].strip()
         self.last_name = row[4].strip()
-        self.is_active = (row[5].strip() in ["True", "1", "yes", "y"])
+        self.is_active = (row[5].strip().lower() in ["true", "1", "yes", "y"])
         self.save()
         self.role = desired_role
         self.post_create(user)
diff --git a/modoboa/relaydomains/models.py b/modoboa/relaydomains/models.py
index 36f8eee5b..628e7cd54 100644
--- a/modoboa/relaydomains/models.py
+++ b/modoboa/relaydomains/models.py
@@ -122,14 +122,15 @@ class RelayDomain(admin_models.AdminObject):
             raise BadRequest(_("Invalid line"))
         self.domain = admin_models.Domain(
             name=row[1].strip(), type="relaydomain", quota=0,
-            enabled=(row[5].strip() in ["True", "1", "yes", "y"])
+            enabled=(row[5].strip().lower() in ["true", "1", "yes", "y"])
         )
         self.domain.save(creator=user)
         self.target_host = row[2].strip()
         self.target_port = row[3].strip()
         self.service, created = Service.objects.get_or_create(
             name=row[4].strip())
-        self.verify_recipients = (row[6].strip() in ["True", "1", "yes", "y"])
+        self.verify_recipients = (
+            row[6].strip().lower() in ["true", "1", "yes", "y"])
         self.save(creator=user)