DKIM with multi-hosting

Hello,

I'm not sure how to configure the DKIM mailet in a multi hosting scenario.

The documentation at https://james.apache.org/howTo/dkim.html offers the
following snippet

<processors>
  <processor state="relay" enableJmx="true">
    <mailet match="All" class="org.apache.james.jdkim.mailets.DKIMSign">
      <signatureTemplate>v=1; s=james3; d=domain.example.com ; h=from
: reply-to : subject : date : to : cc : resent-date : resent-from :
resent-sender : resent-to : resent-cc : in-reply-to : references :
list-id : list-help : list-unsubscribe : list-subscribe : list-post :
list-owner : list-archive; a=rsa-sha256; bh=; b=;</signatureTemplate>
      <privateKey>
      -----BEGIN RSA PRIVATE KEY-----
      [Your Private Key]
      -----END RSA PRIVATE KEY-----
      </privateKey>
    </mailet>
  </processor>
</processors>

However this means that the domain is hard coded and works only in a single
domain hosting scenario.
Am I supposed to configure a dkim processor for each domain I'm hosting
even if the rest of the configuration is the same ?

This doesn't seem to align well with configuring the hosted domains through
the REST API and even when using the domainlist.xml file it means duplicate
declarations ...

(maybe I misunderstand the use of the api for administering domains in
https://james.apache.org/server/manage-webadmin.html#Administrating_domains)

Shouldn't dkim information be configured/provided in the same place as the
domains are configured ?


Thanks !
jean