deny hosts = ${if exists{/etc/exim4/host_blacklist}{/etc/exim4/host_blacklist}{}}
message = I'm terribly sorry, but it seems you have been blacklisted
deny hosts = ${if exists{/etc/exim4/host_blacklist}{/etc/exim4/host_blacklist}{}}
message = I'm terribly sorry, but it seems you have been blacklisted