Optionally skip the installation of additional perl modules.

defaults/main.yml

@@ -121,6 +121,10 @@ spamassassin_ole2macro_github_plugin_score: '3'
 
 # https://github.com/bigio/spamassassin-dmarc
 spamassassin_dmarc_github_plugin: True
+# Set to false on legacy systems where the current Mail::DMARC::PurePerl CPAN
+# release no longer supports the system Perl. The role will keep managing the
+# already installed plugin code and configuration.
+spamassassin_dmarc_install_perl_module: true
 spamassassin_dmarc_github_reject_score: '0.3'
 spamassassin_dmarc_github_qar_score: '0.2'
 spamassassin_dmarc_github_dmarc_none_score: '0.1'

tasks/spamassassin.yml

@@ -139,13 +139,16 @@
   block:
     - name: dmarc required packages, EL
       yum: pkg={{ spamassassin_dmarc_perl_requirements }} state=present
-      when: ansible_distribution_file_variety == "RedHat"
+      when:
+        - spamassassin_dmarc_install_perl_module | bool
+        - ansible_distribution_file_variety == "RedHat"
 
     - name: Install the DMARC Perl module from CPAN
       community.general.cpanm:
         name: '{{ item }}'
       become: true
       loop: '{{ spamassassin_dmarc_perl_packages }}'
+      when: spamassassin_dmarc_install_perl_module | bool
 
     - name: Get the dmarc plugin code from github
       get_url: url={{ spamassassin_dmarc_github_plugin_url }} dest={{ spamassassin_conf_dir }}/dmarc.pm owner=root group=root mode='0644'