diff --git a/Prometheus/install_Alertmanager.sh b/Prometheus/install_Alertmanager.sh
index 219a91e..be4f237 100644
--- a/Prometheus/install_Alertmanager.sh
+++ b/Prometheus/install_Alertmanager.sh
@@ -61,6 +61,12 @@ echo "--------------------------------------------------------"
 read -p "Do you want to enable Email Notifications? [y/N]: " ENABLE_EMAIL
 if [[ "$ENABLE_EMAIL" =~ ^[Yy]$ ]]; then
     read -p "Enter SMTP Host (e.g. smtp.qq.com:465): " SMTP_HOST
+    # Ensure port is included
+    if [[ ! "$SMTP_HOST" == *":"* ]]; then
+        echo "Warning: Port is missing. Using default port :465"
+        SMTP_HOST="${SMTP_HOST}:465"
+    fi
+
     read -p "Enter SMTP Auth Username (Email): " SMTP_USER
     read -s -p "Enter SMTP Auth Password: " SMTP_PASS
     echo ""