diff --git a/backend/app/email/sender.py b/backend/app/email/sender.py
index 9329ea1..b7c7358 100644
--- a/backend/app/email/sender.py
+++ b/backend/app/email/sender.py
@@ -73,10 +73,12 @@ def deliver_many(messages: list[EmailMessage]) -> None:
         )
         return
 
+    sent = 0
     with smtp:
         for message in messages:
             try:
                 smtp.send_message(message)
+                sent += 1
             except smtplib.SMTPException as exc:
                 # Ex. « 550 sender not authorized », « 535 auth failed ».
                 logger.error(
@@ -84,6 +86,13 @@ def deliver_many(messages: list[EmailMessage]) -> None:
                     message["From"],
                     exc,
                 )
+    # RGPD : ni destinataire ni corps, seulement le compte et le sujet.
+    logger.info(
+        "Emails remis : %d/%d — sujet=%r",
+        sent,
+        len(messages),
+        messages[0]["Subject"],
+    )
 
 
 def send(to: str, subject: str, body: str) -> None:
diff --git a/backend/app/logging_config.py b/backend/app/logging_config.py
index fbb05ad..4d35cc9 100644
--- a/backend/app/logging_config.py
+++ b/backend/app/logging_config.py
@@ -9,7 +9,11 @@ from app.config import get_settings
 
 
 def configure_logging() -> None:
+    # `force=True` : on réinstalle le handler racine même si l'import de
+    # `app.main` se fait après la configuration de logging d'uvicorn/gunicorn,
+    # sinon les logs `app.*` n'apparaissent pas dans la sortie du conteneur.
     logging.basicConfig(
         level=get_settings().log_level,
         format="%(asctime)s %(levelname)s %(name)s %(message)s",
+        force=True,
     )