|string> */ public function rules(): array { return [ 'domain' => ['required','string','max:191','unique:domains,domain'], 'total_quota_mb' => ['required','integer','min:1'], // 0 = unlimitiert wäre riskant – ich empfehle >0 // 'default_mailbox_quota_mb' => ['nullable','integer','min:1','lte:total_quota_mb'], 'is_active' => ['sometimes','boolean'], 'is_system' => ['sometimes','boolean'], ]; } }