diff --git a/backend/mailer.py b/backend/mailer.py
index fa62448..4f6113b 100644
--- a/backend/mailer.py
+++ b/backend/mailer.py
@@ -1,6 +1,8 @@
+import asyncio
 import json
 import logging
 import smtplib
+import threading
 from email.mime.base import MIMEBase
 from email.mime.multipart import MIMEMultipart
 from email.mime.text import MIMEText
@@ -11,6 +13,9 @@ from backend.config import charger_config, RACINE
 
 log = logging.getLogger("photobooth.mailer")
 
+FICHIER_SPOOL = RACINE / "data" / "email_spool.json"
+_spool_lock = threading.Lock()
+
 
 def envoyer_photo(destinataire: str, chemin_photo: Path) -> bool:
     """Envoie une photo par email."""
@@ -66,6 +71,80 @@ def envoyer_photo(destinataire: str, chemin_photo: Path) -> bool:
         return False
 
 
+# --- Spool : file d'attente pour emails en echec ---
+
+def ajouter_au_spool(destinataire: str, chemin_photo: str):
+    with _spool_lock:
+        spool = _charger_spool()
+        spool.append({"email": destinataire, "photo": chemin_photo})
+        _sauver_spool(spool)
+    log.info(f"Email pour {destinataire} mis en file d'attente ({len(spool)} en attente)")
+
+
+def _charger_spool() -> list:
+    if not FICHIER_SPOOL.exists():
+        return []
+    try:
+        with open(FICHIER_SPOOL, "r", encoding="utf-8") as f:
+            return json.load(f)
+    except (json.JSONDecodeError, OSError):
+        return []
+
+
+def _sauver_spool(spool: list):
+    try:
+        with open(FICHIER_SPOOL, "w", encoding="utf-8") as f:
+            json.dump(spool, f, ensure_ascii=False)
+    except OSError:
+        pass
+
+
+def taille_spool() -> int:
+    with _spool_lock:
+        return len(_charger_spool())
+
+
+def traiter_spool() -> int:
+    """Tente d'envoyer les emails en attente. Retourne le nombre envoyes."""
+    with _spool_lock:
+        spool = _charger_spool()
+    if not spool:
+        return 0
+
+    envoyes = 0
+    restants = []
+    for entry in spool:
+        chemin = Path(entry["photo"])
+        if not chemin.exists():
+            log.warning(f"Spool: photo introuvable {chemin}, email ignore")
+            continue
+        ok = envoyer_photo(entry["email"], chemin)
+        if ok:
+            envoyes += 1
+        else:
+            restants.append(entry)
+            break  # si un echoue, inutile de continuer (pas de connexion)
+
+    if envoyes > 0 or len(restants) < len(spool):
+        # garder les non-envoyes + ceux pas encore tentes
+        idx = envoyes + len(restants)
+        restants.extend(spool[idx:])
+        with _spool_lock:
+            _sauver_spool(restants)
+        log.info(f"Spool: {envoyes} envoye(s), {len(restants)} en attente")
+
+    return envoyes
+
+
+async def tache_spool_periodique():
+    """Tache asyncio qui vide le spool toutes les 60s."""
+    while True:
+        await asyncio.sleep(60)
+        if taille_spool() > 0:
+            log.info(f"Spool: tentative d'envoi ({taille_spool()} en attente)")
+            await asyncio.get_event_loop().run_in_executor(None, traiter_spool)
+
+
 FICHIER_EMAILS = RACINE / "data" / "emails_history.json"
 
 
diff --git a/backend/main.py b/backend/main.py
index f602665..eb3f69b 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -28,7 +28,7 @@ from backend.effects import appliquer_filtre, appliquer_overlay, chroma_key, lis
 from backend.collage import creer_strip, creer_collage
 from backend.destinations import distribuer_photo, detecter_usb, compteur_restant, reset_compteur, recuperer_booth_password
 from backend.printer import lister_imprimantes, imprimer
-from backend.mailer import envoyer_photo, charger_emails_historique, effacer_emails_historique
+from backend.mailer import envoyer_photo, charger_emails_historique, effacer_emails_historique, ajouter_au_spool, taille_spool, tache_spool_periodique
 from backend.qrcode_gen import generer_qr, qr_galerie
 
 logging.basicConfig(level=logging.INFO, format="%(asctime)s [%(name)s] %(message)s")
@@ -187,9 +187,11 @@ async def lifespan(app: FastAPI):
     t.start()
     task_dslr = asyncio.create_task(surveiller_dslr())
     task_push = asyncio.create_task(_pusher_preview())
+    task_spool = asyncio.create_task(tache_spool_periodique())
     yield
     task_dslr.cancel()
     task_push.cancel()
+    task_spool.cancel()
     log.info("Arret du photobooth")
     camera.deconnecter()
 
@@ -774,7 +776,11 @@ async def api_email(donnees: dict):
     if not chemin.exists():
         return JSONResponse({"erreur": "Photo introuvable"}, status_code=404)
     ok = envoyer_photo(email_dest, chemin)
-    return {"succes": ok}
+    if ok:
+        return {"succes": True}
+    ajouter_au_spool(email_dest, str(chemin))
+    _sauvegarder_email_historique(email_dest)
+    return {"succes": True, "spool": True, "en_attente": taille_spool()}
 
 
 @app.get("/api/emails/historique")
diff --git a/frontend/js/share.js b/frontend/js/share.js
index 5ce04bb..1ddf563 100644
--- a/frontend/js/share.js
+++ b/frontend/js/share.js
@@ -142,8 +142,10 @@ async function envoyerEmail() {
   fermerEmail();
   afficherStatut('Envoi en cours...', 'succes');
   const resultat = await apiPost('/api/email', { email, photo: photoFinale });
-  if (resultat.succes) {
-    afficherStatut('Email envoye !', 'succes');
+  if (resultat.spool) {
+    afficherStatut(`Email en file d'attente (${resultat.en_attente}) — sera envoyé au retour de la connexion`, 'succes');
+  } else if (resultat.succes) {
+    afficherStatut('Email envoyé !', 'succes');
   } else {
     afficherStatut('Erreur d\'envoi email', 'erreur');
   }