Improve configuration with Postfix sender rewrite

roles/common/defaults/main.yml

@@ -53,6 +53,7 @@ postfix_external_smtp_host: 'localhost'
 postfix_external_smtp_port: 587
 postfix_external_smtp_username: 'myuser'
 postfix_external_smtp_password: 'mypass'
+postfix_external_sender_rewrite_regexp: '.*'
 
 with_ssh: True
 ssh_ports:

roles/common/templates/postfix/sasl_sender_rewrite.j2

@@ -2,4 +2,4 @@
 {% from 'templates/ansible/prolog.j2' import prolog with context %}
 {{ prolog() }}
 {% endif -%}
-/.*/    {{ postfix_external_smtp_username }}
+/{{ postfix_external_sender_rewrite_regexp }}/    {{ postfix_external_smtp_username }}