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Exchange 2007 Public folders will not receive e-mail from outside domain

Hi-

I have an SBS2008 server running Exchange 2007. Mail flow works fine using the private (mail) information store. We can also use public folders internally and send/receive e-mail to/from these mail-enabled public folders without any issues. However, here's the problem:
When we send a message from an EXTERNAL domain to any one of these mail-enabled public folders, I get an NDR back stating:
This message was created automatically by mail delivery software.

"A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  helpdesk@<domain_name.com>
    No Such User Here"


I know what you are probably thinking: He doesn't have the Anonymous Account set to "Contributer" permissions on these public folders. Well, I can tell you that I have, in fact, given the Anonymous account "Contributor" permissions on all folders, but I STILL get these NDRs.
Can you help resolve this for me? Any help/forward motion would be greatly appreciated.

Thanks,
Brian
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ethernet69
Asked:
ethernet69
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1 Solution
 
timhodkinCommented:
Have you checked that the folder can recieve mail from non authenticated users?

In mail flow settings of the folder from the public folders manager untick the "only allow authentcated users" I forget exact location.

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ethernet69Author Commented:
Can you please be more specific? I don't know where you are talking about finding this setting. Please provide details where in the Exchange Management console this can be found...
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Alan HardistyCommented:
Can your users internally email the Public Folder user (helpdesk@yourdomain.com) and does the email hit the Public Folder?
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ethernet69Author Commented:
Hi Alan...Yes, it works just fine from inside the domain
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Alan HardistyCommented:
Just testing things out on my Exchange 2010 server!
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ethernet69Author Commented:
Okey dokey smokey :-)
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Alan HardistyCommented:
Hmmmm - Do you use a 3rd party to spam filter your mail before it hits your server or a device like a Barracuda?
Does mail get delivered directly to your server?
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Alan HardistyCommented:
Is the problem just related to one particular company / person sending you mail and getting rejected or is this happening to everyone who is trying to send you mail?
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ethernet69Author Commented:
Turns out that the issue was caused by one of MY personal domains not being able to send to the SBS2008/Ex2007 box...it actually worked just fine when I used Gmail, for example...LOL
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