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

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.
<xxxxx.com #5.7.1 smtp;550 5.7.1 Unable to relay for xxxxx@xxxxxxx.com>

Error 2.

You do not have permission to send to this recipient. For Assistance, contact your system administrator.
<xxxxx.com #5.7.1 smtp;550 5.7.1 <xxxxxx@xxxxxxxx.com>... 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.
      xxxxxxxx@xxxxxxx.com
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acsservices
Asked:
acsservices
2 Solutions
 
mmudryCommented:
Is xxxx@xxxx.com your domain or the sending domain?
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acsservicesAuthor Commented:
sorry for the confusion just trying to block out each end.

In Error 1 and 2, the first xxxxxx.com is our domain the second xxxxx@xxxxx.com is recipients email address

In Error 3 the xxxx@xxxxx.com is the recipients email address
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mmudryCommented:
It definately sounds like something on the receivers side.  Do you have an SPF record defined?  
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SembeeCommented:
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 dnsreport.com and see if it throws back any errors in the email configuration section.

Simon.
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nitadminCommented:
Go to www.dnsreports.com 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.
http://www.zonedit.com/blcheck.html

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.
http://www.zonedit.com/smtp.html

Cheers,
NITADMIN
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nitadminCommented:
The first link should be
www.dnsreport.com

Cheers,
NITADMIN
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