diff --git a/dovecot/defaults/main.yml b/dovecot/defaults/main.yml
index dcf1bde29e567cc6df8312daaab7ef4652af74f5..f65607181db8d1a8c6ce952cd854fd71dbf95886 100644
--- a/dovecot/defaults/main.yml
+++ b/dovecot/defaults/main.yml
@@ -40,4 +40,5 @@ dovecot_auth_default_realm: ''
 dovecot_auth_krb5_keytab: ''
 dovecot_auth_mechanisms:
   - plain
+dovecot_mail_namespaces: []
 dovecot_special_mailbox_auto_subscribe: false
diff --git a/dovecot/templates/conf.d/10-mail.conf.j2 b/dovecot/templates/conf.d/10-mail.conf.j2
index 52df2b7dba55a7ee7fdb07964632ae19a13e01b6..f74f8b76d1faf76f1613fa40702bca6a5d2ad148 100644
--- a/dovecot/templates/conf.d/10-mail.conf.j2
+++ b/dovecot/templates/conf.d/10-mail.conf.j2
@@ -79,6 +79,14 @@ namespace inbox {
   # See 15-mailboxes.conf for definitions of special mailboxes.
 }
 
+{% for namespace in dovecot_mail_namespaces %}
+namespace {
+  {% for key, value in namespace.items() %}
+  {{ key }} = {{ value }}
+  {% endfor %}
+}
+{% endfor %}
+
 # Example shared namespace configuration
 #namespace {
   #type = shared