节点。正则表达式:Get " From: "和" To: "

Given this text file:

鉴于这种文本文件:

Received: from unknown (HELO aws-bacon-delivery-svc-iad-1007.vdc.g.com) ([10.146.157.151])
  by na-mm-outgoing-6102-bacon.iad6.g.com with ESMTP; 12 Apr 2011 14:30:47 +0000
Return-Path: 0000012f4a2a0037-528dbafb-e773-44be-bef5-07d8f63e6aee-000000@email-bounces.g.com
Date: Tue, 12 Apr 2011 14:42:37 +0000
From: [email protected]
To: [email protected]
Message-ID: <0000012f4a2a0037-528dbafb-e773-44be-bef5-07d8f63e6aee-000000@email.g.com>
Subject: test
Mime-Version: 1.0
Content-Type: text/plain;
 charset=UTF-8
Content-Transfer-Encoding: 7bit
X-AWS-Outgoing: 199.255.192.79

testing123
Received: f