Add quota-warning script and config

roles/mailserver_dovecot/tasks/main.yml

@@ -127,6 +127,13 @@
     line: '\1mail_plugins = $mail_plugins sieve'
   notify: Reload dovecot service
 
+- name: Copy quota-warning script
+  become: true
+  ansible.builtin.template:
+    src: quota-warning.sh.j2
+    dest: /usr/local/bin/quota-warning.sh
+    mode: "755"
+
 - name: Copy 90-quota.conf
   become: true
   ansible.builtin.template:

roles/mailserver_dovecot/templates/conf.d/90-quota.conf.j2

@@ -15,3 +15,17 @@ service quota-status {
     user = postfix
   }
 }
+
+plugin {
+  quota_warning = storage=95%% quota-warning 95 %u
+  quota_warning2 = storage=80%% quota-warning 80 %u
+}
+
+service quota-warning {
+  executable = script /usr/local/bin/quota-warning.sh
+  unix_listener quota-warning {
+    user = vmail
+    group = vmail
+    mode = 0660
+  }
+}

roles/mailserver_dovecot/templates/quota-warning.sh.j2

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+PERCENT=$1
+USER=$2
+
+cat << EOF | /usr/lib/dovecot/dovecot-lda -d "$USER" -o "plugin/quota=maildir:User quota:noenforcing"
+From: postmaster@{{ ansible_hostname }}.tunuifranken.info
+Subject: Quota warning - $PERCENT% reached
+
+Your mailbox can only store a limited amount of emails.
+Currently it is $PERCENT% full. If you reach 100% then
+new emails cannot be stored. Thanks for your understanding.
+EOF