standard mta on arch is not ssmtp

so use variable for distro specific mtas

roles/server/tasks/main.yml

@@ -7,7 +7,7 @@
   ignore_errors: True
 
 - block:
-  - include_tasks: utilities/ssmtp.yml
+  - include_tasks: utilities/mta.yml
   - include_tasks: utilities/netdata.yml
     when: netdata is defined and netdata == true
   - include_tasks: utilities/snmpd.yml

roles/server/tasks/utilities/mta.yml

@@ -1,6 +1,6 @@
 - name: server | utilities | install ssmtp
   package:
-    name: "ssmtp"
+    name: "{{ mta_package }}"
     state: present
   when: postfix is not defined or postfix == false