Re: Host Unreachable

Tech-Archive recommends: Speed Up your PC by fixing your registry

From: Beth Belluardo [MSFT] (bethfr_at_online.microsoft.com)
Date: 04/14/04 

Date: Wed, 14 Apr 2004 09:55:42 -0400

Hi,

Can you run an NSLookup on your Exchange server and return the MX records
for the domain you are trying to send to?

Also, when you telnet to them on port 25, what do you see? Is it a mail
banner or do you see something like this:

220*******************************************************0*2******0********
***************
 2002*******2***0*00

If you see the above, they have a pix firewall with the fixup mail guard
running. The fixup mailguard does not understand EHLO or Extended SMTP.
Can they disable the fixup and let you test mail to them?

Best Regards,
Beth 

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"fkl" <anonymous@discussions.microsoft.com> wrote in message
news:1c6ae01c421b1$d9030bc0$a101280a@phx.gbl...
> Using Exchange 5.5 on NT4.  We got this error "host
> unreachable" sending out to a certain domain - they have
> no problem sending to us, and most of our outgoing emails
> are ok.  I'm able to telnet to the host at issue with no
> problem, problem occurs when using Outlook client.
>
> Any ideas?
> thanks,
>
> fkl