diff --git a/emailadmin/inc/class.emailadmin_imap.inc.php b/emailadmin/inc/class.emailadmin_imap.inc.php
index 9db68d5db2..de6bf66def 100644
--- a/emailadmin/inc/class.emailadmin_imap.inc.php
+++ b/emailadmin/inc/class.emailadmin_imap.inc.php
@@ -241,7 +241,8 @@ class emailadmin_imap extends Horde_Imap_Client_Socket implements defaultimap
 				{
 					return $this->getParam($name);
 				}
-				throw new egw_exception_wrong_parameter("Tried to access unknown attribute '$name'!");
+				// calling Horde_Imap_Client's __get() method available since 2.24.1
+				return parent::__get($name);
 		}
 	}