diff --git a/canaille/app/configuration.py b/canaille/app/configuration.py
index a5072799..bddee471 100644
--- a/canaille/app/configuration.py
+++ b/canaille/app/configuration.py
@@ -163,7 +163,8 @@ def validate(config, validate_remote=False):
     from canaille.backends import Backend
 
     Backend.instance.validate(config)
-    validate_smtp_configuration(config["CANAILLE"]["SMTP"])
+    if smtp_config := config["CANAILLE"]["SMTP"]:
+        validate_smtp_configuration(smtp_config)
 
 
 def validate_keypair(config):
diff --git a/tests/app/commands/test_check.py b/tests/app/commands/test_check.py
index 05d79873..5163580f 100644
--- a/tests/app/commands/test_check.py
+++ b/tests/app/commands/test_check.py
@@ -12,3 +12,10 @@ def test_check_command_fail(testclient):
     runner = testclient.app.test_cli_runner()
     res = runner.invoke(cli, ["check"])
     assert res.exit_code == 1, res.stdout
+
+
+def test_check_command_no_smtp(testclient):
+    testclient.app.config["CANAILLE"]["SMTP"] = None
+    runner = testclient.app.test_cli_runner()
+    res = runner.invoke(cli, ["check"])
+    assert res.exit_code == 0, res.stdout