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Our email server is getting hit with many emails that are getting returned undeliveralble. &nbsp;Example: 
 
&nbsp;Subject: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Delivery Status Notification (Failure) 
&nbsp; &nbsp; &nbsp; Sent: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6/27/2006 3:01 PM 
The following recipient(s) could not be reached: 
&nbsp; &nbsp; &nbsp; nasszabo@fnbmarengo.com on 6/27/2006 3:01 PM 
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; The e-mail account does not exist at the organization this message was sent to. &nbsp;Check the e-mail address, or contact the recipient directly to find out the correct address. 
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;dc-exchange.fnbmarengo.com #5.1.1&gt; 
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The following recipient(s) could not be reached: 
&nbsp; &nbsp; &nbsp; zephyufea@fcacorp.com on 6/19/2006 1:22 AM 
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; The e-mail account does not exist at the organization this message was sent to. &nbsp;Check the e-mail address, or contact the recipient directly to find out the correct address. 
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;mail.fcacorp.com #5.1.1&gt; 
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Our domain is xxxxxxxx@delkin.com, why are all these coming in that are not even close to our domain name? &nbsp;Is someone trying to relay? 
Scott 

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Our email server is getting hit with many emails that are getting returned undeliveralble. Example:

 Subject:	Delivery Status Notification (Failure)
 Sent:	6/27/2006 3:01 PM
The following recipient(s) could not be reached:
 nasszabo@fnbmarengo.com on 6/27/2006 3:01 PM
 The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.
 <dc-exchange.fnbmarengo.com #5.1.1>
---------------------------------------------------------------------------
The following recipient(s) could not be reached:
 zephyufea@fcacorp.com on 6/19/2006 1:22 AM
 The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.
 <mail.fcacorp.com #5.1.1>
--------------------------------------------------------------------------
Our domain is xxxxxxxx@delkin.com, why are all these coming in that are not even close to our domain name? Is someone trying to relay?
Scott

Undeliverable email - with unknow domain names

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.