Domains: Fetch list of domains from database

templates/domains.html.twig

@@ -5,6 +5,20 @@
 {% block content %}
     <h2>Domains</h2>
 
-    <p>List of domains ... <b>TODO</b></p>
-    <p><a href="/domains/42">Test</a></p>
+    <p>This is a list of all domains auto-generated from the existing mail accounts and aliases. As such it is read-only.</p>
+
+    <table>
+        <tr>
+            <th style="min-width: 12em">Domain</th>
+            <th>Accounts</th>
+            <th>Aliases</th>
+        </tr>
+        {% for domain, domainCounts in domainList -%}
+        <tr>
+            <td><a href="/accounts?domain={{ domain | escape('url') }}">{{ domain }}</a></td>
+            <td>{{ domainCounts['accounts'] }}</td>
+            <td>{{ domainCounts['aliases'] }}</td>
+        </tr>
+        {% endfor %}
+    </table>
 {% endblock %}