diff --git a/conf/sogo.conf b/conf/sogo.conf
index b19e9f6..30b29bb 100644
--- a/conf/sogo.conf
+++ b/conf/sogo.conf
@@ -6,6 +6,7 @@
   SOGoProfileURL = "mysql://__DBUSER__:__DBPASS__@localhost:3306/__APP__/sogo_user_profile";
   OCSFolderInfoURL = "mysql://__DBUSER__:__DBPASS__@localhost:3306/__APP__/sogo_folder_info";
   OCSSessionsFolderURL = "mysql://__DBUSER__:__DBPASS__@localhost:3306/__APP__/sogo_sessions_folder";
+  NGImap4ConnectionStringSeparator = ".";
   SOGoAppointmentSendEMailNotifications = YES;
   SOGoEnablePublicAccess = YES;
   SOGoMailingMechanism = smtp;