### **Environment**:

Your OpenProject Version: 12.1.0

### **Steps to reproduce:**

1. Have one of the following unprefixed ENV-Variables set:

```bash
EMAIL_DELIVERY_CONFIGURATION
EMAIL_DELIVERY_METHOD
SMTP_ADDRESS
SMTP_AUTHENTICATION
SMTP_DOMAIN
SMTP_ENABLE_STARTTLS_AUTO
SMTP_PASSWORD
SMTP_PORT
SMTP_USER_NAME
Begin of the insertionSMTP_SSL
End of the insertion ```

### **Actual Behavior**

Env vars are ignored and e-mail settings not Begin of the insertionset.End of the insertion Begin of the deletion set. End of the deletion

### **Expected Behavior**

Unprefixed e-mail settings should also be accepted.