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Exchange 2k broadcasts unkown recipients

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by jgiroux

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I manage an Exchange2k box that is displaying a weird problem. When Exchange has an unkown recipient it broadcasts the email to all.

Does anyone know how to fix this by setting something to forward all unkown recipients to the admin account or adesignated junk address vs. sending to everyone??

Some more background is that the server uses Microsoft's connector for POP3 mailboxes. It POPs email from our isp who is catching all of our domain's email in a single account. (multi drop POP)The exchange server then distributes the email to mailboxes once downloaded in bulk.

I've found an article in Microsoft's KB that probably will fix this but involves using VB and Exchange Developer kit to create and register a dll. I'm hoping that I'm just missing something obvious.

Thanks in advance!

- Jeff Giroux

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by ann777

There are two items you can view to find out what is happening:

http://support.microsoft.com/default.aspx?scid=kb;en-us;Q325227

http://support.microsoft.com/default.aspx?scid=kb;en-us;Q325410

Both of the above are webcasts; the first describes message flow in Exchange 2000, and the second describes the MTA (message transfer agent) and how it works.

It sounds as if the MTA is broadcasting these message to everyone, but I have not used Exchange 2000 and cannot help you further.... except to say that Exchange 5.5 has a place for administrators to place an e-mail account to receive e-mail addressed to the proper domain but not a valid user at the domain. It would surprise me greatly, if Microsoft removed this function from Exchange 2000.

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