diff --git a/defaults/main.yml b/defaults/main.yml
index c75a20e7973189959cb34fa2e8e010801cca7300..97f9790818ad84183bd1cf0f38a80e317f621edc 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -1,4 +1,7 @@
 ---
+# The name of this mail system, set in '/etc/mailname'
+postfix__mailname: '{{ ansible_fqdn }}'
+
 ## Variables for the main.cf template, in top-down order
 postfix__myorigin:
 postfix__smtpd_banner: '$myhostname ESMTP $mail_name ({{ ansible_distribution }})'
diff --git a/tasks/install-postfix_debian.yml b/tasks/install-postfix_debian.yml
new file mode 100644
index 0000000000000000000000000000000000000000..446670bf991ffd93c6f0c81fad9b4bb5027cd00b
--- /dev/null
+++ b/tasks/install-postfix_debian.yml
@@ -0,0 +1,21 @@
+---
+- name: Configure /etc/mailname on Debian hosts
+  copy:
+    content: "{{ postfix__mailname + '\n' }}"
+    dest: /etc/mailname
+    owner: root
+    group: root
+    mode: 0644
+  notify: ['reload postfix']
+
+- name: Install Postfix and related packages
+  apt:
+    name: '{{ item }}'
+    state: present
+    cache_valid_time: 3600
+  with_items:
+    - postfix
+    - mailutils
+    - make
+...
+# vi: set ts=2 sts=2 sw=2 et ft=yaml:
diff --git a/tasks/main.yml b/tasks/main.yml
index a4a28f32c2d226a388fed7fcc496fe75f443becc..60ca5c76441905988575a113bf74746467700057 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -1,4 +1,14 @@
 ---
+- include_tasks: '{{ task_file }}'
+  loop_control:
+    loop_var: task_file
+  with_first_found:
+    - tasks/install-postfix_{{ ansible_distribution | lower }}-{{ ansible_distribution_version | lower }}.yml
+    - tasks/install-postfix_{{ ansible_distribution | lower }}-{{ ansible_distribution_release | lower }}.yml
+    - tasks/install-postfix_{{ ansible_distribution | lower }}-{{ ansible_distribution_major_version | lower }}.yml
+    - tasks/install-postfix_{{ ansible_distribution | lower }}.yml
+    - tasks/install-postfix_{{ ansible_os_family | lower }}.yml
+
 - name: Generate Postfix 'main.cf' configuration
   template:
     src: templates/main.cf.j2