diff --git a/plinth/modules/email/data/usr/share/freedombox/etc/apache2/conf-available/email-freedombox.conf b/plinth/modules/email/data/usr/share/freedombox/etc/apache2/conf-available/email-freedombox.conf
index 59421bc7e..88c8d49d8 100644
--- a/plinth/modules/email/data/usr/share/freedombox/etc/apache2/conf-available/email-freedombox.conf
+++ b/plinth/modules/email/data/usr/share/freedombox/etc/apache2/conf-available/email-freedombox.conf
@@ -14,10 +14,7 @@
     ProxyAddHeaders off
 
     # Require SSO
-    Include includes/freedombox-single-sign-on.conf
-    <IfModule mod_auth_pubtkt.c>
-        TKTAuthToken "admin"
-    </IfModule>
+    Use AuthOpenIDConnect
 </Location>
 
 # Automatic configuration for clients like Thunderbird: