diff --git a/app/helpers/messages_helper.rb b/app/helpers/messages_helper.rb
index ebe9e68..8ca30cf 100644
--- a/app/helpers/messages_helper.rb
+++ b/app/helpers/messages_helper.rb
@@ -1,6 +1,6 @@
 module MessagesHelper
     def without_list_prefix(subject)
-        subject.sub(/^\[.+\]\s*/, '')
+        subject.sub(/^\[(ruby-core|ruby-list|ruby-talk|ruby-dev).+?\]\s/, '')
     end
 
     MARGIN = 50