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You do not have permission to send to this recipient.  Unable to relay for Username@domain

Vbbugs
Vbbugs asked
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Last Modified: 2007-12-19
You do not have permission to send to this recipient.  For assistance, contact your system administrator.
            <mailserver #5.7.1 smtp;550 5.7.1 Unable to relay for bhardy@hhc2000.com>

We have an exchange 2003 server.  We run our email with SMTP.  I am having problems with serveral emails hard bouncing with this same message, just another username.  Our employees are trying to send under their domain account.  What could be the problem?

We use MS Outlook 2003 for our email.
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Expert of the Year 2007
Expert of the Year 2006

Commented:
What is the exact scenario that you are getting the message?

Internal user sending out?
External user sending in?
Internal user sending to another internal user?

Depending on that response will give an idea as to where to look.

If it is internal going out, do your emails go out directly, or through a smart host?

Simon.

Author

Commented:
It is sending out external mail sending to an external emial account.  How do I know if I am using a smart host?
Expert of the Year 2007
Expert of the Year 2006
Commented:
This one is on us!
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Author

Commented:
There was no smart host in this area.  So I am assuming I am not using Smart Host.
Expert of the Year 2007
Expert of the Year 2006

Commented:
If you don't have an SMTP Connector, then you probably are not using a smart host.

How do your clients connect to the server? Exchange Server client (selecting Exchange server in Outlook), POP3/SMTP ?
Is it only to one domain, more than one domain? Any patterns at all?

Simon.

Author

Commented:
We have one domain, but we are recieving this message from a couple different domains....but not all our mail.  Also I believe we use SMTP.  Mostly Exchange Server client in outlook.
Expert of the Year 2007
Expert of the Year 2006

Commented:
If it is all Exchange clients and they are getting the message, then it is occurring on the next hop out to the internet.
If you have POP3/SMTP clients (don't confuse that with SMTP delivery of email to Exchange, or Exchange using SMTP to deliver your email out), then it could be an issue with your server.

Without more of a pattern, it is a bit of a guess.

You could be blacklisted for example. I have seen that error generated on that basis before.

Simon.

Author

Commented:
I have checked about the blacklisting and I don't think that is the issue.  We do have SMTP delivery of email to Exchange.
Commented:
This one is on us!
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Author

Commented:
Thanks, will do first thing in the morning.

Author

Commented:
dorongol, that solution did not work.  when I typed the domain as mail.swla.local it was not valid when I clicked check DNS

Commented:
you need to type the external FQDN for your domain i.e instead mail.swla.local  you need the swla.co.uk (or whatever your external domain name is)

Doron

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