diff --git a/basic_setup/s3-retention.sh b/basic_setup/s3-retention.sh
new file mode 100755
index 0000000..0667bb6
--- /dev/null
+++ b/basic_setup/s3-retention.sh
@@ -0,0 +1,32 @@
+#!/bin/bash
+
+echo "Aktualisiere Lifecycle-Regeln (7 Tage) für alle E-Mail-Buckets..."
+
+for BUCKET in $(aws s3api list-buckets --query 'Buckets[].Name' --output text); do
+    
+    # Prüfen, ob der Name auf '-emails' endet
+    if [[ "$BUCKET" == *-emails ]]; then
+        echo "⚙️ Setze 7-Tage-Regel für: $BUCKET"
+        
+        aws s3api put-bucket-lifecycle-configuration \
+            --bucket "$BUCKET" \
+            --lifecycle-configuration '{
+              "Rules": [
+                {
+                  "ID": "DeleteOldEmails",
+                  "Status": "Enabled",
+                  "Expiration": {
+                    "Days": 7
+                  },
+                  "Filter": {
+                    "Prefix": ""
+                  }
+                }
+              ]
+            }'
+    else
+        echo "⏭️ Überspringe (kein E-Mail-Bucket): $BUCKET"
+    fi
+done
+
+echo "Fertig! Alle E-Mail-Buckets löschen jetzt Objekte nach 7 Tagen."
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