postfix: ease configuration of multiple similar aliases

postfix/defaults/main.yml

@@ -34,6 +34,7 @@ postfix_network_access:
 postfix_content_filter: false  # or: spamassassin
 postfix_message_size_limit: 10240000  # 10M
 
+postfix_aliases_rt_url: ''
 postfix_aliases_rt: []
 #  - queue: IT
 #    url: https://rt.example.com

postfix/templates/aliases.j2

 {% for alias in system_aliases %}
-{{ alias.src }}: {{ alias.dest }}
+{% if alias.src is string %}
+{{ alias.src }}: {{ alias.dest if alias.dest is string else alias.dest|join(', ') }}
+{% else %}
+{% for src in alias.src %}
+{{ src }}: {{ alias.dest if alias.dest is string else alias.dest|join(', ') }}
 {% endfor %}
+{% endif %}
+{% endfor %}
+
 {% for alias in postfix_aliases_rt|default([]) %}
-{{ alias.address|default(alias.queue|lower) }}: "|/usr/bin/rt-mailgate --queue {{ alias.queue }} --action correspond --url {{ alias.url }}"
-{{ alias.address|default(alias.queue|lower) }}-comment: "|/usr/bin/rt-mailgate --queue {{ alias.queue }} --action comment --url {{ alias.url }}"
+{{ alias.address|default(alias.queue|lower) }}: "|/usr/bin/rt-mailgate --queue {{ alias.queue }} --action correspond --url {{ alias.url|default(postfix_aliases_rt_url) }}"
+{{ alias.address|default(alias.queue|lower) }}-comment: "|/usr/bin/rt-mailgate --queue {{ alias.queue }} --action comment --url {{ alias.url|default(postfix_aliases_rt_url) }}"
 {% endfor %}

postfix/templates/virtual.j2

@@ -6,7 +6,7 @@ abuse@{{ domain }} {{ adminaddr }}
 
 {% for alias in virtual_aliases %}
 {% if alias.src is string %}
-{{ alias.src }} {{ alias.dest }}
+{{ alias.src }} {{ alias.dest if alias.dest is string else alias.dest|join(', ') }}
 {% else %}
 {% for src in alias.src %}
 {{ src }}@{{ alias.domain }} {{ alias.dest if alias.dest is string else alias.dest|join(', ') }}