Exchange 2007 - 550 5.7.1 Client does not have permissions to send as this sender
A client has an SBS 2008 server running Exchange 2007 SP1 Rollup9 installed.
They have a website that takes orders and sends an email (using PHP mailer) to the clients email address.
now as it is only in the testing phase he is using himself as the from address and to address.
He is receiving bounce backs
Subject: Mail delivery failed: returning message to sender
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:
SMTP error from remote mail server after MAIL FROM:<firstname.lastname@example.org> SIZE=16881:
host mail.somewhere.com.au [203.161.xxx.xxx]:
550 5.7.1 Client does not have permissions to send as this sender
Now from what I believe is the problem is that when the website is sending the email to his address it is hitting the SBS box and the exchange server is thinking that is is a Spoofed email. As it is being sent from an external address/email server and it is being addressed to the same address as it is from.
So in order to get around this I have tried creating a new receive connector and setting it up for anonymous authentication but locking it down by only allowing the IP address of that one external server.
That didn't work so i also added some Extended Right
This still doesn't seem to be working - any advice on where I am going wrong?
*Please note I have nothing to do with setting up the web site - only administering the the SBS domain.