Exim not signing DKIM on outgoing mail

[vettloffah]

I have tried to verify all the settings and it appears everything is set up to allow DKIM signing, yet there is no signature in the header of emails.

relevant options from exim.conf:

dkim_remote_smtp:
  driver = smtp
  interface = ${if exists {/etc/mailips}{${lookup{$original_domain}lsearch{/etc/mailips}{$value}{${lookup{$sender_address_domain}lsearch{/etc/mailips}{$value}{${lookup{${perl{get_sender_from_uid}}}lsearch*{/etc/mailips}{$value}{}}}}}}}}
  helo_data = ${if exists {/etc/mailhelo}{${lookup{$original_domain}lsearch{/etc/mailhelo}{$value}{${lookup{$sender_address_domain}lsearch{/etc/mailhelo}{$value}{${lookup{${perl{get_sender_from_uid}}}lsearch*{/etc/mailhelo}{$value}{$primary_hostname}}}}}}}{$primary_hostname}}
  dkim_domain = mydomain.com
  dkim_selector = default
  dkim_private_key = "/var/cpanel/domain_keys/private/mydomain.com"
  dkim_canon = relaxed

I have also verified that the private key exists, and that there is a proper dns entry for the public key. I have also enabled DKIM through the "Modify an Account" setting in WHM.

What else do I need to do?

Thanks

 

[Infopro]

relevant options from exim.conf:

What does this mean, exactly? Did you modify this file? Mine looks different than yours.

dkim_remote_smtp:
  driver = smtp
  interface = ${if exists {/etc/mailips}{${lookup{$original_domain}lsearch{/etc/mailips}{$value}{${l
ookup{$sender_address_domain}lsearch{/etc/mailips}{$value}{${lookup{${perl{get_sender_from_uid}}}lse
arch*{/etc/mailips}{$value}{}}}}}}}}
  helo_data = ${if exists {/etc/mailhelo}{${lookup{$original_domain}lsearch{/etc/mailhelo}{$value}{$
{lookup{$sender_address_domain}lsearch{/etc/mailhelo}{$value}{${lookup{${perl{get_sender_from_uid}}}
lsearch*{/etc/mailhelo}{$value}{$primary_hostname}}}}}}}{$primary_hostname}}
  dkim_domain = $sender_address_domain
  dkim_selector = default
  dkim_private_key = "/var/cpanel/domain_keys/private/${dkim_domain}"
  dkim_canon = relaxed