Re: No Mail for 4 days now - Arghhh!

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Hi David;

Thanks for the reply! I am using a publishing rule so I tried your second
suggestion which was to change the rule so that requests appear to be coming
from the ISA machine as opposed to the original client.

For some reason - that worked. I don't know why as I've always had that
setting set to preserve the original client.

Can you shed some light on why this is occurring?

Much thanks!
Dave

"David Maskell - BUI @davidm (at) bui.co.za>" <Emailaddresshere-> wrote in
message news:F9C59FDC-2D9F-4AEC-A36C-219FFC83E2A5@xxxxxxxxxxxxxxxx
Sounds like you are using an access rule. Try creating a publishing rule
instead and publish SMTP from External to the IP of the exchange server.

If it does not work, try to change the NAT behaviour of the rule ie: IP
from
Original Client and Requests appear to be coming from the ISA Server, its
under the "to" tab on a publishing rule.
--
David Maskell - BUI
MCSE:Security,Messaging, CISSP.
http://www.bui.co.za


"Always remember to rate the posts!"


"Dave Onex" wrote:

Hi Folks - I've got a mail problem and if anyone could help me pin it
down
I'd sure appreciate it as I'm having a hard time with it...

I'm running ISA 2004, and have been for years, with mostly no issues. I
was
using both Exchange and a separate IIS5 server as a relay however I
recently
phased that out and went back to only using Exchange.

As such it's pretty straightforward: ISA 2004 w/Exchange 2000 located
behind
it.

The problem is that other mail servers can't connect. The ISA logs show
every mail server that tries ends up with;

Failed Connection Attempt and error code 0x8007274c

The Exchange machine has ISA as it's default gateway, no firewall
client.
The ISA 2004 machine has the standard SMTP rule created for All Networks
(and localhost) and it points back to the Exchange machine's IP address.

Internal email works fine - the mail server is working. I tried
disabling
the SMTP filter and have also tried deleting the rule and re-creating
it.

Does anyone out there know what could cause this?





.

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