Update u_e-rspamd.md

docs/u_e-rspamd.md

@@ -167,12 +167,20 @@ To whitelist this particular signature (and enable sending this type of file att
 echo 'PUA.Pdf.Trojan.EmbeddedJavaScript-1' >> data/conf/clamav/whitelist.ign2
 ```
 
-Then restart the clamd-mailcow service container in the mailcow UI, or using docker-compose:
+Then restart the clamd-mailcow service container in the mailcow UI or using docker-compose:
 
 ```bash
 docker-compose restart clamd-mailcow
 ```
 
+Cleanup cached ClamAV results in Redis:
+
+```
+# docker-compose exec redis-mailcow  /bin/sh
+/data # redis-cli KEYS rs_cl* | xargs redis-cli DEL
+/data # exit
+```
+
 ## Discard instead of reject
 
 If you want to silently drop a message, create or edit the file `data/conf/rspamd/override.d/worker-proxy.custom.inc` and add the following content: