Xchange 5.5 behind Wingate?

[desktop]

Hello All

I have a client who is running Exchange 5.5 and Wingate for Firewall Purposes on the same server. The mail is relayed to Messagelabs for Virus Scanning but when we point the Exchange Server to relay to MLabs ALL mail is immediately bounced back. It does not make it to MLabs, it is stopped before it leaves the organisation. If we point the Exchange server to send directly using DNS it goes through. we are running Wingate Ver 5.2.3 (Build 901). Any help or pointers would be really appreciated.

Alan Taylor
Desktop Support Solutions
Manchester
UK

[labull]

Alan,

Tell us more about how SMTP is configured.

If you turn Debug logging on for SMTP it should tell you what's happening. Sounds like SMTP is thinking it's being relayed off of and doesn't like it.


Thanks!

Larry

[desktop]

Thanks for the reply Larry, if you are talking about the SMTP Service in Wingate - It is not running at all. The only Services running are WWW, Telnet & Logfile

[labull]

OK - you've checked "forward all messages to host" and entered the IP address of the the Message Labs server?

Can you tell where the bounce is occuring.

Is Message Labs expecting the traffic from a specific IP address?

Larry

[adrien]

Sounds like MessageLabs is bouncing mail sending from your server.

Do you authenticate with them when you connect? Sounds like this could be an issue for the MessageLabs support desk.

Are you sure they are supposed to accept your outbound mail? I thought those services only scanned incoming for a domain.

Adrien

[desktop]

Thank you again both for your replys.

At the moment to allow outbound mail their is no forwarding set on the Xchange System, mail delivery is done via DNS only with complete success. When we setup either the IP of the MLabs Tower or it's Name we get the bounce backs. We have contacted MLabs the Mail is not getting out of my clients internal network - It is not even getting to MLabs for them to bounce it back! I am sure this muddies the waters further!

Al

[labull]

You could try this - attemp to Telnet to the Message Labs IP on port 25 from the exchange server. That will test basic connectivity.

What message are you getting from the bounce back?

In Internet Mail Service - Diagnostic Logging you can set SMTP Protocol Log to Maximum to see what exchange is doing.

Larry

[desktop]

Thanks again Larry,
We can connected via telnet on Port 25 from the Xchange Box to MLabs. the specific error message is detailed below.

The following recipients could not be reached:
username@desktop.uk.com 25/06/2004 11:15

The recipient name is not recognized.

The MTS-ID of the original message is: c=USA;a= ;p=Organisation name;l=Server Name01-040528130730Z-226
MSEXCH:IMS:Organisation Name:Domain:Server Name 3533 (000B09AA) 553 (#5.7.1)

I have gone onto the customers server and set the logging as you suggested. Thanks Again
Al