What is the domain?

Ed Crowley MCSE+Internet MVP
Freelance E-Mail Philosopher
Protecting the world from PSTs and Bricked Backups!T


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of stephen gaffney
Sent: Sunday, March 09, 2003 12:51 PM
To: Exchange Discussions
Subject: Incoming SMTP problems.. Please help!


Hello,

Apologies for making this my first post, bad etiquette I know, but I'm 
in desperate need...

Yesterday I put our new exchange2000 server in, and everything is 
working fine, apart from incoming SMTP mail - it gets bounced with 
something along these lines to the sender:

 >Reporting-MTA: dns;mail.<mydomain>.com
 >Recieved-From-MTA: dns;smtp.<ispdomain>.com
 >Arrival-date: Sun, 9 Mar 19:39:12 +0000
 >
 >Final-Recipient: rfc822;me@<mydomain>.com
 >Action: Failed
 >Status: 4.4.6

I've checked this kb article
http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B256321

And it says:

4.X.X Persistent Transient Failure
X.4.6 Routing loop detected


Note these addresses have been created on each mail box, so they do 
exists here, and I've added the external domain name as the default 
email domain in the recipient policy.

I can send mail to external addresses fine, so I'm fairly sure this is 
my screw up, not an external thing.

Some info on my setup:

-The exchange server is behind a firewall, and you can telnet to the 
mail server fine from outside.
-The <mydomain>.com domain is hosted by our ISP, and the internal AD 
domain is called domain.local (the AD dns server has no idea about our 
ISP's DNS , all external name resolving is handled by the 
firewall/router).
-our incoming SMTP mail is forwarded to us by our ISP, and I can telnet 
into my mail server from the internet with no problems.
-I've set the FQDN in SMTP virtual server->properties ->delivery-> 
advanced to the same as the MX record our ISP's DNS server. Doing this 
was probably completely wrong, but it didn't work before I did this 
either...

It appears that the exchange server is recieving mail (which suggests 
it's not a DNS issue), it's just not delivering it to the correct mail 
boxes and bouncing it... I can see the SMTP attempts and rejections on 
the firewall monitor...

I'm in a serious bind here, I've spent my whole weekend trying to fix 
this :/ If anyone could help, I would be eternally grateful, and shower 
you with gifts...

Yours hopefully,
stephen gaffney


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