diff --git a/hobo/matomo/utils.py b/hobo/matomo/utils.py
index d7a3c04..e305147 100644
--- a/hobo/matomo/utils.py
+++ b/hobo/matomo/utils.py
@@ -118,6 +118,8 @@ class MatomoWS(object):
             self.url_ws_base = config['URL']
             self.token_auth = config['TOKEN_AUTH']
             self.email_template = config['EMAIL_TEMPLATE']
+            if '%s' in self.email_template:
+                self.email_template = self.email_template.replace('%s', '%(user_login)s')
         except KeyError as exc:
             raise MatomoError('no settings for matomo: %s' % str(exc))
 
@@ -211,7 +213,7 @@ class MatomoWS(object):
             'method': 'UsersManager.addUser',
             'userLogin': user_login,
             'password': password,
-            'email': self.email_template % user_login,
+            'email': self.email_template % {'user_login': user_login},
             'initialIdSite': initial_id_site,
         }
         tree = self.call(data)
diff --git a/hobo/settings.py b/hobo/settings.py
index f6bd7b8..16e62be 100644
--- a/hobo/settings.py
+++ b/hobo/settings.py
@@ -212,7 +212,7 @@ MELLON_USERNAME_TEMPLATE = '{attributes[name_id_content]}'
 # MATOMO_SERVER = {
 #     'URL': 'https://matomo.domain.org',
 #     'TOKEN_AUTH': '0123456789abcdef0123456789abcdef',
-#     'EMAIL_TEMPLATE': 'noreply+%s@domain.org'
+#     'EMAIL_TEMPLATE': 'noreply+%(user_login)s@domain.org'
 # }
 
 MATOMO_SERVER = {}
diff --git a/tests/test_matomo_utils.py b/tests/test_matomo_utils.py
index 40cf56d..dba20a7 100644
--- a/tests/test_matomo_utils.py
+++ b/tests/test_matomo_utils.py
@@ -27,7 +27,11 @@ from hobo.matomo.utils import (
 
 pytestmark = pytest.mark.django_db
 
-CONFIG = {'URL': 'https://matomo.test', 'TOKEN_AUTH': '1234', 'EMAIL_TEMPLATE': 'noreply+%s@entrouvert.test'}
+CONFIG = {
+    'URL': 'https://matomo.test',
+    'TOKEN_AUTH': '1234',
+    'EMAIL_TEMPLATE': 'noreply+%(user_login)s@entrouvert.test',
+}
 
 MATOMO_SUCCESS = b"""<?xml version="1.0" encoding="utf-8" ?>
 <result>
@@ -859,3 +863,27 @@ def test_auto_configure_matomo_error(mocked_post):
             auto_configure_matomo(matomo)
         tracking_js_var = get_variable('visits_tracking_js')
         assert tracking_js_var.value == 'js_code'
+
+
+def test_legacy_email_template_substitution():
+    with override_settings(
+        MATOMO_SERVER={
+            'URL': 'https://matomo.test',
+            'TOKEN_AUTH': '1234',
+            'EMAIL_TEMPLATE': 'noreply+%s@example.net',
+        }
+    ):
+        matomo = MatomoWS()
+        assert matomo.email_template == 'noreply+%(user_login)s@example.net'
+
+
+def test_email_template_no_substitution():
+    with override_settings(
+        MATOMO_SERVER={
+            'URL': 'https://matomo.test',
+            'TOKEN_AUTH': '1234',
+            'EMAIL_TEMPLATE': 'noreply@example.net',
+        }
+    ):
+        matomo = MatomoWS()
+        assert matomo.email_template == 'noreply@example.net'