diff --git a/target/dovecot/15-mailboxes.conf b/target/dovecot/15-mailboxes.conf
index 73ed268c..131d11a1 100644
--- a/target/dovecot/15-mailboxes.conf
+++ b/target/dovecot/15-mailboxes.conf
@@ -21,6 +21,7 @@ namespace inbox {
     special_use = \Drafts
   }
   mailbox Junk {
+    auto = subscribe
     special_use = \Junk
   }
   mailbox Trash {