diff --git a/roles/dovecot/files/shared-mailboxes b/roles/dovecot/files/shared-mailboxes
new file mode 100644
index 0000000000000000000000000000000000000000..28d2ebe5801f35f52806522b5e6fb3f5d5870185
--- /dev/null
+++ b/roles/dovecot/files/shared-mailboxes
@@ -0,0 +1 @@
+mediation-team:::::::
diff --git a/roles/dovecot/files/shared-mailboxes-acl b/roles/dovecot/files/shared-mailboxes-acl
new file mode 100644
index 0000000000000000000000000000000000000000..479101f974f301b5a728bf98f3cda204a36c2bde
--- /dev/null
+++ b/roles/dovecot/files/shared-mailboxes-acl
@@ -0,0 +1,3 @@
+denisse_mediation-team:::::/home/vmail/shared-mailboxes/mediation-team::user=denisse
+dvzrv_mediation-team:::::/home/vmail/shared-mailboxes/mediation-team::user=dvzrv
+morganamilo_mediation-team:::::/home/vmail/shared-mailboxes/mediation-team::user=morganamilo
diff --git a/roles/dovecot/tasks/main.yml b/roles/dovecot/tasks/main.yml
index 9ad91bbce1e0fe80eeef2cf54eef0dc977e4b234..dfdea666539b9b30701a7b10d9e54530316cb860 100644
--- a/roles/dovecot/tasks/main.yml
+++ b/roles/dovecot/tasks/main.yml
@@ -13,6 +13,14 @@
   notify:
     - Reload dovecot
 
+- name: Install shared-mailboxes{,-acl}
+  copy: src={{ item }} dest=/etc/dovecot/ owner=root group=root mode=0644
+  loop:
+    - shared-mailboxes
+    - shared-mailboxes-acl
+  notify:
+    - Reload dovecot
+
 - name: Add vmail group
   group: name=vmail gid=5000
 
diff --git a/roles/dovecot/templates/dovecot.conf.j2 b/roles/dovecot/templates/dovecot.conf.j2
index 4cc04689af3a29bb9ffaf78d28275f9ecfd5714c..4f7de9086ea9bd434775ac76c32d41ed0776843a 100644
--- a/roles/dovecot/templates/dovecot.conf.j2
+++ b/roles/dovecot/templates/dovecot.conf.j2
@@ -33,6 +33,10 @@ namespace inbox {
 	}
 }
 
+passdb {
+	driver = passwd-file
+	args = /etc/dovecot/shared-mailboxes-acl
+}
 passdb {
 	driver = pam
 }
@@ -89,6 +93,18 @@ ssl_options = no_compression
 
 ssl_cipher_list = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
 
+userdb {
+	driver = passwd-file
+	args = /etc/dovecot/shared-mailboxes
+	# https://doc.dovecot.org/configuration_manual/config_file/config_variables/
+	override_fields = uid=vmail gid=vmail home=/home/vmail/shared-mailboxes/%n
+}
+userdb {
+	driver = passwd-file
+	args = username_format=%{original_username} /etc/dovecot/shared-mailboxes-acl
+	# https://doc.dovecot.org/configuration_manual/config_file/config_variables/
+	override_fields = uid=vmail gid=vmail mail=mdbox:~/.mdbox:INDEXPVT=~/indexes/%Ln
+}
 userdb {
 	driver = passwd
 	# https://doc.dovecot.org/configuration_manual/config_file/config_variables/