Index: openacs-4/packages/acs-mail-lite/tcl/email-inbound-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-mail-lite/tcl/email-inbound-procs.tcl,v
diff -u -r1.15.2.12 -r1.15.2.13
--- openacs-4/packages/acs-mail-lite/tcl/email-inbound-procs.tcl	2 Sep 2021 16:40:50 -0000	1.15.2.12
+++ openacs-4/packages/acs-mail-lite/tcl/email-inbound-procs.tcl	28 Dec 2021 10:57:01 -0000	1.15.2.13
@@ -2512,7 +2512,7 @@
 
     # send notification to users with disabled email
     foreach notification $notifications {
-        set notification_list [util_ns_set_to_list -set $notification]
+        set notification_list [ns_set array $notification]
         array set user $notification_list
         set user_id $user(user_id)
         set href [export_vars -base [ad_url]/register/restore-bounce {user_id}]