Install this version with CustomBuild 2.0::
http://help.directadmin.com/item.php?id=576


Manual way to update to this version:
cd /etc cp exim.conf exim.conf.backup cp exim.pl exim.pl.backup wget -O exim.conf http://files.directadmin.com/services/SpamBlocker/4.3.0/exim.conf-SpamBlockerTechnology-v4.3.0.txt wget -O exim.pl http://files.directadmin.com/services/SpamBlocker/4.3.0/exim.pl wget -O exim.strings.conf http://files.directadmin.com/services/SpamBlocker/4.3.0/exim.strings.conf wget -O exim.variables.conf http://files.directadmin.com/services/SpamBlocker/4.3.0/exim.variables.conf cd /etc/virtual touch bad_sender_hosts bad_sender_hosts_ip blacklist_domains blacklist_senders whitelist_domains whitelist_hosts whitelist_hosts_ip whitelist_senders use_rbl_domains skip_av_domains skip_rbl_domains chown mail:mail bad_sender_hosts bad_sender_hosts_ip blacklist_domains blacklist_senders whitelist_domains whitelist_hosts whitelist_hosts_ip whitelist_senders use_rbl_domains skip_av_domains skip_rbl_domains chmod 644 bad_sender_hosts bad_sender_hosts_ip blacklist_domains blacklist_senders whitelist_domains whitelist_hosts whitelist_hosts_ip whitelist_senders use_rbl_domains skip_av_domains skip_rbl_domains /etc/init.d/exim restart

Related Forum Thread:
http://forum.directadmin.com/showthread.php?t=50059