Link to home
Start Free TrialLog in
Avatar of b00meRr
b00meRr

asked on

Fix a problem with SMTP and Exchange SBS 2003: 550 Administrative Prohibition

I am having problems with email bouncing Back on one of our email addresses.

We are running Exchange on SBS 2003 and (as far as I can tell) Have smart hosts properly configured.

I have checked that the domain is not blacklisted and I can send email internally as well as from other addresses on the same domain through the same gateway.  The problem only exists on the email address/user account.

When I checked the Message Tracking Center in Exchange System Manger for the test emails I found that the SMTP Transfer was started and then immediately a Non-Delivered Report was Generated.

I have also Managed to use telnet to send a message through our SMTP server as that email address.

I'm Stumped.  Can anyone in the cloud figure it out?

Attached is the bounce back reply.
Your message did not reach some or all of the intended recipients.
 
      Subject:	test
      Sent:	11/18/2008 1:51 PM
 
The following recipient(s) could not be reached:
 
      [user]@Hotmail.com on 11/18/2008 1:51 PM
            There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.
            <[mydomain].com #5.5.0 smtp;550 Administrative prohibition>

Open in new window

Avatar of Exchange_Geek
Exchange_Geek
Flag of India image

Have you read this link  http://support.microsoft.com/kb/300171 ??

Avatar of b00meRr
b00meRr

ASKER

As I said, the problem only exists on the one user account.  So it probably isn't a reverse dns issue.
It's just a troubleshooting step - would you mind checking it.

Else, disconnect the user account - create a new mailbox and check if it works - if it does export messages from old mailbox to new one.

If it doesn't "it is not a problem with one user"
ASKER CERTIFIED SOLUTION
Avatar of b00meRr
b00meRr

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of b00meRr

ASKER

To be specific.

You need to select the correct SMTP email address.  It turns out that the incorrect SMTP email address was selected as primary and as a result our email provider was bouncing back the messages.