diff --git a/target/scripts/startup/setup.d/security/rspamd.sh b/target/scripts/startup/setup.d/security/rspamd.sh
index c3056e39..bc2e936f 100644
--- a/target/scripts/startup/setup.d/security/rspamd.sh
+++ b/target/scripts/startup/setup.d/security/rspamd.sh
@@ -229,13 +229,13 @@ function __rspamd__setup_learning() {
 
   # From anywhere to Junk
   imapsieve_mailbox1_name = Junk
-  imapsieve_mailbox1_causes = COPY
+  imapsieve_mailbox1_causes = COPY APPEND
   imapsieve_mailbox1_before = file:${SIEVE_PIPE_BIN_DIR}/learn-spam.sieve
 
   # From Junk to Inbox
   imapsieve_mailbox2_name = INBOX
   imapsieve_mailbox2_from = Junk
-  imapsieve_mailbox2_causes = COPY
+  imapsieve_mailbox2_causes = COPY APPEND
   imapsieve_mailbox2_before = file:${SIEVE_PIPE_BIN_DIR}/learn-ham.sieve
 }
 EOF