- In WHM, navigate to the Exim Configuration Editor
- Select Advanced Editor
- Add the following code to the POSTMAILCOUNT section
- Add the following to the TRANSPORTSTART section:
- Save and restart
smarthost_dkim:
driver = manualroute
domains = !+local_domains
require_files = "+/var/cpanel/domain_keys/private/${lookup{$sender_address_domain}dsearch{/var/cpanel/domain_keys/private/}}"
# Exclude null sender messages from relaying via the smarthost
condition = ${if or {{!eq{$sender_address}{}} {!eq{$sender_host_address}{}}}}
transport = remote_smtp_smart_dkim
route_list = $domain SMARTHOST::587
smarthost_regular:
driver = manualroute
domains = !+local_domains
# Exclude null sender messages from relaying via the smarthost
condition = ${if or {{!eq{$sender_address}{}} {!eq{$sender_host_address}{}}}}
transport = remote_smtp_smart_regular
route_list = $domain SMARTHOST::587
Replace all instances of SMARTHOST with your SMTP hostname
remote_smtp_smart_dkim:
driver = smtp
hosts_require_tls = *
interface = ${if exists {/etc/mailips}{${lookup{$sender_address_domain}lsearch*{/etc/mailips}{$value}{}}}{}}
helo_data = ${if exists {/etc/mailhelo}{${lookup{$sender_address_domain}lsearch*{/etc/mailhelo}{$value}{$primary_hostname}}}{$primary_hostname}}
dkim_domain = $sender_address_domain
dkim_selector = default
dkim_private_key = "/var/cpanel/domain_keys/private/${lookup{$dkim_domain}dsearch{/var/cpanel/domain_keys/private/}}"
dkim_canon = relaxed
headers_add = "${perl{check_mail_permissions_headers}}"
remote_smtp_smart_regular:
driver = smtp
hosts_require_tls = *
interface = ${if exists {/etc/mailips}{${lookup{$sender_address_domain}lsearch*{/etc/mailips}{$value}{}}}{}}
helo_data = ${if exists {/etc/mailhelo}{${lookup{$sender_address_domain}lsearch*{/etc/mailhelo}{$value}{$primary_hostname}}}{$primary_hostname}}
headers_add = "${perl{check_mail_permissions_headers}}"
All traffic from the cPanel/WHM server will be routed to the Spam Experts filtering nodes.