Regex help

[xlam]

Hi all

I'm newbie in perl and stacked with one regular exression. Im writing some mail parser and want to find mail id.

The header example:
From root@test.com Wed Nov 14 12:35:06 2007
Return-Path: <root@test.com>
X-Original-To: test
Delivered-To: test@test.com
Received: by test.com (Postfix, from userid 0)
id 25CFB1A406C; Wed, 14 Nov 2007 12:35:06
To: test@test.com
Subject: sdsd
Message-Id: <20071114093506.25CFB1A406C@test.com>
Date: Wed, 14 Nov 2007 12:35:06 From: root@test.com (root)

I must extract 25CFB1A406C string.

I can do it with this regexp:
/.*\sid\s(([A-Z]|[0-9]){11}).*/

But as I understood it is simple and can handle unwanted strings.

When I tried to make it more narrow like:
/.*Received:.*\sid\s(([A-Z]|[0-9]){11}).*/

I cant extract mail ID. Can you help me with writing regexp?

Thanks in advance.

 

[MillerH]

\sid\s+([A-Z0-9]{11});