delivering' [in Rule 45(b)(1)] indicates personal service, and a personal service requirement can be unduly restrictive"); see also Cordius Trust v. Kummetfeld, No. 99 Civ. 3200, 2000 WL 10268, at *2 (S.D.N.Y. Jan. 3, 2000) (holding that because "alternative service by means of certified mail reasonably in