From 40bc80f703188d3578776a1e503c08ee8a67cb39 Mon Sep 17 00:00:00 2001
From: Antoine Nguyen <tonio@ngyn.org>
Date: Fri, 25 Jul 2025 12:07:02 +0200
Subject: [PATCH] Safer variable access

fix #3609
---
 modoboa/webmail/lib/sendmail.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/modoboa/webmail/lib/sendmail.py b/modoboa/webmail/lib/sendmail.py
index b4af4a517..c547204d0 100644
--- a/modoboa/webmail/lib/sendmail.py
+++ b/modoboa/webmail/lib/sendmail.py
@@ -128,7 +128,8 @@ def send_mail(request, attributes: dict, attachments: list) -> tuple[bool, str |
     elif conf["smtp_secured_mode"] == "starttls":
         options.update({"use_tls": True})
     if conf["smtp_authentication"]:
-        if not settings.WEBMAIL_DEV_MODE:
+        dev_mode = getattr(settings, "WEBMAIL_DEV_MODE", False)
+        if not dev_mode:
             options.update(
                 {
                     "backend": "modoboa.lib.smtp_backend.OAuthBearerEmailBackend",