Delivery problems for external mail.

[chaljo]

I am running Exchange 2000 Server under Small Business Server 2000. I have a broadband connection to the internet via a D-Link 405 router.

The server is set up as a Proxy Server and this is working fine. Exchange 2000 can send internal emails but cannot send or receive external messages.

Messages sent to external addresses reach the SMTP queue and appear to connect to the remote server but fail to deliver. Exchange just keeps retrying and failing.

Messages sent from remote sites bounce after about 48 hours with the message that there was no response from the destination and that the remote server has given up. No obvious messages appear in the event log.

Can anybody help please?

 

[Sohni]

In SBS2000 you have to "publish" your exchange server in ISA console.

 

[chaljo]

Thanks Sohni, but I cannot find out easily how to do it. The help info has lots to say about publishing printers and folders, but not too much on publishing services. Can you point me in the right direction please?

 

[Sohni]

Administrative Tools - ISA Server - ISA Management
or
Administrator Console - Internet Security and... -> Servers and Arrays -> <yourServer> -> Publishing

In a &quot;folder tree&quot; you will see Publishing -> Server Publishing Rules.

From context menu Secure Mail Server ...

Follow the wizard.

 

[Sohni]

BTW

You might probably have to enable also DNS related ports for mail transfer to work properly

TCP port 53 in both directions
and
Predefined DNS Lookup filter (UDP)

I am not totally confident in this DNS setup.