Problem with Exchange

17 Mar 2006 3:09 PM

Chris T.

Please help. I'm having an issue with routing email to an exchange server
from an exchange server. Both servers are located on the same network (I
have two domains in the office, each with their own exchange box.) When I
try to send an email to company a from company b, the email is immediately
bounced back with the following message.

cth***@companya.com on 3/17/2006 9:35 AM
There was a SMTP communication problem with the recipient's email server.
Please contact your system administrator.
<companyb.net #5.5.0 smtp;554 <cth***@companya.com>: Recipient address
rejected: Access denied>

This is killing me. I have both servers behind a firewall and the
Watchguard uses NAT to route the smtp traffic to the appropriate server.
When I do an nslookup from company b's server for company a. The correct
internet ip is displayed.

Thanks for your input.
Chris

17 Mar 2006 3:35 PM

Mark Arnold [MVP]

On Fri, 17 Mar 2006 07:09:27 -0800, Chris T.
<Chr***@discussions.microsoft.com> wrote:

Show quote

>Please help. I'm having an issue with routing email to an exchange server
>from an exchange server. Both servers are located on the same network (I
>have two domains in the office, each with their own exchange box.) When I
>try to send an email to company a from company b, the email is immediately
>bounced back with the following message.
>
>cth***@companya.com on 3/17/2006 9:35 AM
>There was a SMTP communication problem with the recipient's email server.
>Please contact your system administrator.
><companyb.net #5.5.0 smtp;554 <cth***@companya.com>: Recipient address
>rejected: Access denied>
>
>This is killing me. I have both servers behind a firewall and the
>Watchguard uses NAT to route the smtp traffic to the appropriate server.
>When I do an nslookup from company b's server for company a. The correct
>internet ip is displayed.
>
>Thanks for your input.
>Chris

On Global Settings, Message Delivery, Sender Filtering
are there any addresses or domains listed there or anywhere else
there?

17 Mar 2006 6:36 PM

Chris T.

Mark,

Thanks for the message. I've checked those areas and didn't find anything.
I think the problem was actually with our firewall. I rebuilt the SMTP Proxy
and it started working.

Thanks,
Chris

Show quote

"Mark Arnold [MVP]" wrote:

> On Fri, 17 Mar 2006 07:09:27 -0800, Chris T.
> <Chr***@discussions.microsoft.com> wrote:
>
> >Please help. I'm having an issue with routing email to an exchange server
> >from an exchange server. Both servers are located on the same network (I
> >have two domains in the office, each with their own exchange box.) When I
> >try to send an email to company a from company b, the email is immediately
> >bounced back with the following message.
> >
> >cth***@companya.com on 3/17/2006 9:35 AM
> >There was a SMTP communication problem with the recipient's email server.
> >Please contact your system administrator.
> ><companyb.net #5.5.0 smtp;554 <cth***@companya.com>: Recipient address
> >rejected: Access denied>
> >
> >This is killing me. I have both servers behind a firewall and the
> >Watchguard uses NAT to route the smtp traffic to the appropriate server.
> >When I do an nslookup from company b's server for company a. The correct
> >internet ip is displayed.
> >
> >Thanks for your input.
> >Chris
>
> On Global Settings, Message Delivery, Sender Filtering
> are there any addresses or domains listed there or anywhere else
> there?
>