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Bogus helo

Posted on 2006-11-07
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Last Modified: 2007-12-19
I am recieving this bounce back message. I run an inhouse exchange server. Can someone tell me what it means and how to repair it?

Your message did not reach some or all of the intended recipients.

      Subject:  FW: bounced back email..

      Sent:     11/7/2006 10:35 AM


The following recipient(s) could not be reached:

      Christian Wigley on 11/7/2006 10:35 AM

            There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.

            <caledclean.com #5.5.0 smtp;553 Bogus helo vu1a.heiue9o.aol.com. <http://unblock.secureserver.net/?ip=209.xxx.xxx.xxx>>
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Question by:zwig2002
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davidis99 earned 500 total points
ID: 17898442
If the antivirus on your desktops and servers are up to date and your systems are virus and spyware free, most likely this is being cause by a third party who's been in contact with someone at your firm, and that third party has been infected with one of several viruses that has its own mass mailing engine, where it harvests addresses from a local address book, then sends infected email from one address book recipient to another.  If this happens, and an address book has out of date email addresses, the mail server receiving the bogus email will send a bounce back message to the server it appears the mail came from (yours.)   About the only thing you can do, if this is the case, is check all your internal PCs for viruses, and ask the users to make sure their external contacts are running up to date antivirus software and have checked their PCs for viruses.
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by:zwig2002
ID: 17898537
I have found the virus. It was on one of my mobile users laptop.
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