This is an administrative message. I recently switched c2hs@haskell.org to members-only posts to reduce spam (in fact, that is now the setting for all haskell.org lists). Some people found their messages where rejected by the list software. That is because they were not subscribed with the email address from which their posts originated. If you encounter similar problems, please double check your subscription. I am sorry for the inconvenience, but I am sure you appreciate to get less spam, too. Cheers, Manuel