Exim – anti-spam per domain setting
acl_check_rcpt:
blah …
blah …
blah …
deny message = rejected as $sender_host_address is blacklisted in $dnslist_domain\n$dnslist_text
domains = domain-one.com : domain-two.com : domain-three.com
dnslists = sbl-xbl.spamhaus.org
blah …
blah …
blah …
reference link : http://www.exim-new-users.co.uk/content/view/65/39/