OutLook 2003 Can Send but Cannot Reply

J

Josep MP

Scenario :
Exchange 2000 Server on a Windows 2000 Server Active Directory.
Exchange Client is : OutLook 2003.

Users have their Inbox account and an additional POP3 Account.
Users can send and receive eMAIL internally (nice).
Users can send and receive eMAIL to and from Internet (nice).


PROBLEM
(This problem occurs on 3 client PCs only, but 2 more client Pcs work fine
and have no problems)

Users cannot reply the eMAILS they have received from Internet.
When a user tries to reply an SMTP eMAIL he has received from Internet,
automatically and immediatly he receives a NDR message : 550 5.7.1 Unable to
relay for [email protected].

NOTICE that [email protected] is the Reply_To adress of the person that has
sent the original message we are trying to reply.

I confirm users can send with no problems to Internet, but they cannot reply.
And they can send, receive and reply internal (Global Adress List) eMAILs.

Any idea ?

Thanks !!!


PEP
 
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