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Exchange Does Not Send External Mail

Posted on 2008-06-24
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Last Modified: 2010-03-06
Posting this again as it is still unresolved.
I have a Small Business Server 2003 SP2 and Exchange has SP2. Every email sent from Outlook 2000 results in the following NDR within a second or two from clicking send.

The recipient could not be processed because it would violate the security policy in force
<myserver.local #5.7.0 smtp;530 5.7.0 Authentication required>

Same result for OWA.
Same result with or without a Smart Host.
No changes to to Exchange in months. I am told the domain hosting company did make some unknown change about the same time this problem began. I do not understand how this could be a factor because the bounce happens to fast for it to come from the hosting companies server.
johncfds
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Question by:johncfds
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Expert Comment

by:Hallidays
ID: 21855623
It is the local exchange, there is a policy in force stopping this, are you sure nothing changed around the time of this starting?

"The recipient could not be processed because it would violate the security policy in force
<myserver.local #5.7.0 smtp;530 5.7.0 Authentication required>
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Author Comment

by:johncfds
ID: 21855670
As certain as I can be nothing changed.  Do you think it is a group policy ot recipient policy?
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Expert Comment

by:Hallidays
ID: 21855741
Definately not a GP, I would say recipient policy - you can send into the exchange without problems?
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Author Comment

by:johncfds
ID: 21856294
No complains about internal mail.  I will check the recipient policy thanks.
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Author Comment

by:johncfds
ID: 21886120
Yep, internal mail works fine.
The recipient policy looks perfectly normal.
????????????
John.
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Expert Comment

by:Hallidays
ID: 21899495
Does it work from Outlook 2003 clients?
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Author Comment

by:johncfds
ID: 21899766
There are no Outlook 03 clients.
UPDATE: I had overlooked the SBS SMTP Connector.  It was setup to forward mail to a smart host that I suspect is did not previously require authentication.  I will delete this connector on next visit and the let the Default SMTP Virtul Server send outgoing mail.
More later.
John.
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Accepted Solution

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johncfds earned 0 total points
ID: 21903507
PROBLEM SOLVED
The ISP changed the dymanic ip address and the Smart Host being used by the SBS SMTP Connector now requires authentication.  Deleted the SBS SMTP Connector, used the Default SMTP Virtual Connector with a new Smart Host with the proper credentials.
Thanks to everyone for their suggestions!
John.
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Author Comment

by:johncfds
ID: 21903516
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