I am having a problem with a Exchange 2003 server that is also a POP3
server. I have configured Outlook express to use the POP3 server to
retrieve emails. When I am using a OE client local to the Exchange
server everything seems to work fine and I can send and receive email to
local and remote email addresses.
When I use a OE client that is not local to the Exchange server I can
receive email, but not send. The error I receive is:
The message could not be sent because one of the recipients was rejected
by the server. The rejected e-mail address was
'someone@othercompany.net'. Subject 'test', Account: 'Frank', Server:
'mail.localcompany.com', Protocol: SMTP, Server Response: '550 5.7.1
Unable to relay for someone@othercompany.net', Port: 25, Secure(SSL):
No, Server Error: 550, Error Number: 0x800CCC79
On the OE client I have checked "My server requires authentication",
which seems to clear up this issue for many people, but I am still
receiving the error.
On the Exchange server under the "Default SMTP Virtual Server" I have
checked the "Allow all computers which successfully authenticate to
relay, regardless of the list above"
The Authentication is set for 'Anonymous Access', 'Basic authentication'
and 'Integrated Windows Authentication"
If I set up an open relay I am able to send email from a remote
location...So I think there is something I'm missing with the client
authentication. Is there someway to verify my authentication is working.
Any help is appreciated
Thnx
Frank