FWIW we test blacklists (public and local) before doing valid-user checks, so blacklisted spammers can't enumerate our userlist.
Whether it helps in reality I don't know. It does however mean a few more blacklist lookups, which is not so good. -- ## List details at http://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/
