Personally, I have an Exim filter that rejects any message containing the word "bitcoin" in $message_body. This won't be useful for you if you actually use bitcoins for anything, but it works for me.
Ellen -- mailto:el...@ekrus.org -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
