How to stop this,,I am getting response from people who is no longer with my working with my Company and was never a member of the people cft mail goup

Here is the error message am getting from my exchange server,

From: Microsoft Exchange
Sent: Thursday, April 22, 2010 9:47 AM
To: Doris Kibassa
Subject: Undeliverable: People cft


Delivery has failed to these recipients or distribution lists:

Herbert Louis
The recipient's e-mail address was not found in the recipient's e-mail system. Microsoft Exchange will not try to redeliver this message for you. Please check the e-mail address and try resending this message, or provide the following diagnostic text to your system administrator.

  _____  

Sent by Microsoft Exchange Server 2007







Diagnostic information for administrators:

Generating server: tzdarhq-caht2.zain.co.tz

IMCEAEX-_O=Celtel_ou=First+20Administrative+20Group_cn=Recipients_cn=hlouis@tz.zain.com
#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##

Original message headers:

Received: from tzdarhq-msx02.zain.co.tz ([fe80::48ed:c21f:1a99:6c9f]) by
 tzdarhq-caht2.zain.co.tz ([::1]) with mapi; Thu, 22 Apr 2010 09:46:45 +0300
Content-Type: application/ms-tnef; name="winmail.dat"
Content-Transfer-Encoding: binary
From: Doris Kibassa <Doris.Kibassa@tz.zain.com>
To: Herbert Louis
      <IMCEAEX-_O=Celtel_ou=First+20Administrative+20Group_cn=Recipients_cn=hlouis@tz.zain.com>
Date: Thu, 22 Apr 2010 09:46:45 +0300
Subject: People cft
Thread-Topic: People cft
Thread-Index: AcrcbUkj8RNtJO42SpKmUY7a/vp6LgFekfxA
Message-ID: <CFF28CBDB57CCD44B2E88A1EA0B0ED28318A186316@TZDARHQ-MSX02.zain.co.tz>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-Auto-Response-Suppress: DR, OOF, AutoReply
X-MS-TNEF-Correlator: <CFF28CBDB57CCD44B2E88A1EA0B0ED28318A186316@TZDARHQ-MSX02.zain.co.tz>
acceptlanguage: en-US
MIME-Version: 1.0
X-ExProperty: MjE6VlRfQlNUUjpEb3JpcyBLaWJhc3Nh
X-ExProperty: MTM6VlRfVUk0OjA-
X-ExProperty: MTI6VlRfVUk0OjI-
X-ExProperty: NzpWVF9VSTQ6MQ--
X-ExProperty: NjpWVF9VSTQ6MA--
X-ExProperty: NTpWVF9VSTQ6MQ--
X-ExProperty:
 NDpWVF9CU1RSOi9vPUVYQ0hHMDctT1JHL291PUV4Y2hhbmdlIEFkbWluaXN0cmF0aXZlIEdyb3VwIChGWURJQk9IRjIzU1BETFQpL2NuPVJlY2lwaWVudHMvY249RG9yaXNLaWJhc3Nh
X-ExProperty:
 MzpWVF9CU1RSOkNOPURvcmlzIEtpYmFzc2EsT1U9Q29ycG9yYXRlIFVzZXJzLE9VPVVzZXIgR3JvdXBzLERDPXphaW4sREM9Y28sREM9dHo-
X-ExProperty: MjpWVF9CU1RSOkRvcmlzLktpYmFzc2FAdHouemFpbi5jb20-
X-ExProperty: MTpWVF9VSTQ6MQ--
SeniAsked:
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oztrodamusCommented:
Hi Seni,

The first thing that comes to my mind is it looks like you have an infected workstation on your network that is using your Exchange server to send out bogus emails. However, you said you're getting responses from people no longer working  at your company. By any chance were these former employees a delegate of another employees mailbox? In Exchange 2003 and to the best of my knowledge Exchange 2007 before you delete a user in Exchange you need to make sure you remove their delegate status if they have any. Otherwise, everytime the user of the mailbox the deleted user was a delegate of gets an email a delivery failure message will be created as well. To fix the problem you have to recreate the deleted user exactly as they were, readd their delegate status, and then remove it. You can then safely remove their account from Exchange.
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krishnasmtpport25Commented:
Hi Seni,

As oztrodamus chances that your workstation is affected.
You see anything on your sent Items ?

If not close your outlook and working form OWA for some time and see if you still get the emails

Regards
Krishna
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SeniAuthor Commented:
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