The problem is that the machine is using a made-up name, such as "nonexistenthost.example.com", that just doesn't exist on the Internet. It needs to have an A record in DNS. That's all.
-Scott
At 02:44 PM 10/22/2002, you wrote:
I got in touch with the ISP and it looks like they their mail servers set up
like this: a public smtp server on the outside of the proxy and a private
mail server inside the proxy.
The internal mail server was receiving the messages first (and has no
corresponding host record in the DNS), then sending the messages to the
public mail server to deliver to destination mail server. At this point I'm
not certain how the SMTP communication works to complete the HELO process,
but tell me if this is the problem.
Either their needs to be a host record in the DNS for this internal mail
server or do the names of both servers need to be the same?
Am I even in the vicinity of the problem?
Philip Butler
Internal Systems Engineer
Region VI ESC
phone 936.435.2503
fax 936.295.1447
[EMAIL PROTECTED]
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:Declude.JunkMail-owner@;declude.com]On Behalf Of R. Scott Perry
Sent: Tuesday, October 22, 2002 10:11 AM
To: [EMAIL PROTECTED]
Subject: Re: [Declude.JunkMail] Exchange going though ISA Proxy fails
HELO test
>Any idea why this would happen?
Yes, I have a very good idea. It's sending "HELO" or "EHLO" in an SMTP
transaction, followed by a made-up host name.
The log file or X-RBL-Warning: header should show you the hostname that the
ISA Proxy claims to be. Most likely, there is a configuration option in
ISA Proxy that lets you choose what the hostname should be.
-Scott
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