diff --git a/lib/larch.rb b/lib/larch.rb
index c164263..bda84f3 100644
--- a/lib/larch.rb
+++ b/lib/larch.rb
@@ -215,7 +215,9 @@ def copy_messages(mailbox_from, mailbox_to)
         end
 
         begin
-          next unless msg = mailbox_from.peek(guid)
+          unless msg = mailbox_from.peek(guid)
+            @failed += 1
+          end
 
           if msg.envelope.from
             env_from = msg.envelope.from.first