diff --git a/ident_switch.php b/ident_switch.php
index 2a83369..d4c6499 100644
--- a/ident_switch.php
+++ b/ident_switch.php
@@ -658,6 +658,8 @@ class ident_switch extends rcube_plugin
 					$rc->session->remove($k);
 				}
 			}
+			$delimiter = isset($config['imap_delimiter']) ? $config['imap_delimiter']:'.';
+            $_SESSION['imap_delimiter'] = $delimiter;
 			$_SESSION['username'] = $rc->user->data['username'];
 			$_SESSION['password'] = $_SESSION['password' . self::MY_POSTFIX];
 			$_SESSION['iid' . self::MY_POSTFIX] = -1;