1 files changed, 3 insertions, 2 deletions
diff --git a/lib/MaildirIndexer/Store.pm6 b/lib/MaildirIndexer/Store.pm6
index 7447643..e54fa8f 100644
--- a/lib/MaildirIndexer/Store.pm6
+++ b/lib/MaildirIndexer/Store.pm6
@@ -38,8 +38,9 @@ method del-file(IO $file) {
 }
 
 method mailbox-for-email(MaildirIndexer::Email $email) {
-    my $id = $email.message-id or return Nil;
-    with %!mailboxes-for-id{$id} { return .[*-1] }
+    for |$email.refs() -> $ref {
+        with %!mailboxes-for-id{$ref} { return .[*-1] }
+    }
     return Nil;
 }