sysinternals.com has a utility called hostname.exe that given a name, like Server123 will return its IP. Either way you are doing a DNS lookup.
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if you want to get the ip from sender then look at the details of the message recieved there will be his ip address
Return-Path: <cs-auto@adobe.com>
Delivered-To: webmail@mail.com
Received: (qmail 20498 invoked from network); 3 Aug 2006 14:11:11 +0200
Received: from unknown (HELO exprod6og51.obsmtp.com) (xxx.xxx.xxx.xxx)
by mail.domovanje.com with SMTP; 3 Aug 2006 14:11:10 +0200
Received: from source ([xxx.xxx.xxx.xxx]) by exprod6ob51.postini.com ([xxx.xxx.xxx.xxx]) with SMTP;
Thu, 03 Aug 2006 05:11:04 PDT
Received: from inner-relay-1.corp.adobe.c
by outbound-smtp-2.corp.adobe
for <webmail@cobit.si>; Thu, 3 Aug 2006 05:11:18 -0700 (PDT)
Received: from p01webapp01.macromedia.com
by inner-relay-1.corp.adobe.c
for <webmail@mail.com>; Thu, 3 Aug 2006 05:11:01 -0700 (PDT)
Message-ID: <22020371.1154607051178.Ja
Date: Thu, 3 Aug 2006 05:10:51 -0700 (PDT)
From: Adobe Membership <cs-auto@adobe.com>
To: webmail@cobit.si
Subject: URGENT - Adobe.com Membership Password Assistance (24 hour limit)
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding:
X-Mailer: ColdFusion MX Application Server
X-Spam-Checker-Version: SpamAssassin 3.0.3 (2005-04-27) on mail.domovanje.com
X-Spam-Level: ***
X-Spam-Status: No, score=3.0 required=6.0 tests=BAYES_50 autolearn=no
version=3.0.3
X-Antivirus: AVG for E-mail 7.1.405 [268.10.5/406]
to get this if you got outlook express then click on the message and choose properties then choose details
Business Accounts
Answer for Membership
by: harbor235Posted on 2006-09-07 at 05:34:48ID: 17470194
If you know the FQDN (fully qualified domain name) you can use nslookup or dig.
dig host.mydomain.com
nslookup host.mydomain.com
Is this what you mean?
harbor235 ;}