Recieving bounce back messages from one domain. the messages vary with each bounce back.

Posted on 2006-11-20
Last Modified: 2010-03-06
We have confirmed with the recipient that our domain isn't blacklisted on their end.

Error 1.

You do not have permission to send to this recipient. For Assistance, contact your system administrator.
< #5.7.1 smtp;550 5.7.1 Unable to relay for>

Error 2.

You do not have permission to send to this recipient. For Assistance, contact your system administrator.
< #5.7.1 smtp;550 5.7.1 <>... Relaying denied. Please check your mailserver first or restart your mail session.>

Error 3.

This is an automatically generated Delivery Status Notification.
Delivery to the following recipients failed.
Question by:acsservices
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Expert Comment

ID: 17981930
Is your domain or the sending domain?

Author Comment

ID: 17981998
sorry for the confusion just trying to block out each end.

In Error 1 and 2, the first is our domain the second is recipients email address

In Error 3 the is the recipients email address

Accepted Solution

mmudry earned 63 total points
ID: 17982194
It definately sounds like something on the receivers side.  Do you have an SPF record defined?  
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LVL 104

Assisted Solution

Sembee earned 62 total points
ID: 17982375
This would look like a problem with the remote server.
The middle message is what I would expect to get from an ISPs server that is used to send email, not a server that is used to receive email.
The others are fairly standard messages.

Put your domain in to and see if it throws back any errors in the email configuration section.


Expert Comment

ID: 17984842
Go to and check to see that you don't have errors.

go tot this website and enter your exchange server's public IP address and see if you ip address is on black list.

Did you setup PRT record for your Exchange Server's Public IP address.
Usually, your ISP who provided you with static ip address should do this.

Also do an telnet test with the remote server and see what happens.
you can use the cmd line or you can use this website.


Expert Comment

ID: 17984846
The first link should be


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