Index: program/steps/mail/list.inc
===================================================================
--- program/steps/mail/list.inc	(revision f5e7b353079f182d6d57e05b37e1eeb32872bc1a)
+++ program/steps/mail/list.inc	(revision 609d3923d7dc674263ddea990387dbf5488fabc6)
@@ -53,4 +53,7 @@
 
 $mbox_name = $IMAP->get_mailbox_name();
+
+// Synchronize mailbox cache, handle flag changes
+$IMAP->mailbox_sync($mbox_name);
 
 // initialize searching result if search_filter is used
@@ -117,4 +120,2 @@
 // send response
 $OUTPUT->send();
-
-