--- a/mod_firewall/scripts/spam-blocking.pfw	Thu Feb 23 14:14:38 2017 +0000
+++ b/mod_firewall/scripts/spam-blocking.pfw	Thu Feb 23 14:26:19 2017 +0000
@@ -38,6 +38,11 @@
 #### Rules for presence stanzas ####
 ::user/check_spam_presence
 
+# These may be received if rosters get out of sync, and are harmless
+# because they will not be routed to the client unless necessary
+TYPE: unsubscribe|unsubscribed
+PASS.
+
 # We don't want to receive presence from random strangers,
 # but still allow subscription requests
 NOT TYPE: subscribe