Re: SMTP 500 Error

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No, I'm not really sure what that means...

KJ

On Nov 26, 1:37 pm, "Michael Dragone" <no.e-mail=less_spam> wrote:
You're sure you smarthost all of your outgoing mail through your ISP's SMTP
server?

"KS Kenny Johnston" <k...@xxxxxxxx> wrote in messagenews:cf0ab89e-c0e2-41df-b36d-dbb7bd28b4a2@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx



I am running SBS on a Dell Server for our small office of about ten
employees. For some reason none of us can send to one specific address
from our Exchange accounts. This is the message we get:

"From: System Administrator
Sent: Monday, November 26, 2007 11:26 AM
To: USERNAME
Subject: Undeliverable: SUBJECT

Your message did not reach some or all of the intended recipients.

Subject: SUBJECT
Sent: 11/26/2007 11:25 AM

The following recipient(s) could not be reached:

U...@xxxxxxxxx on 11/26/2007 11:26 AM
There was a SMTP communication problem with the
recipient's email server. Please contact your system administrator.
<ORGDOMAIN.org #5.5.0 smtp;550 <SENDERIP>: Client host
rejected: Use your ISPs mail server (6)>

I'm not sure, but in my Googling I found that it could be a problem
with authenticating that where the receiver got mail from,
ORGDOMAIN.org is the same as where reply to that mail would go. In our
case that is not true, since we bounce all of our Exchange accounts
off of a server where we have some non-Exchange accounts hosted. Any
idea how we fix this, we have been using this server for eight months
and this is the first accoutn that got this kind of bounces.

Thanks,- Hide quoted text -

- Show quoted text -

.

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