Hi I have an SBS 2011 server that has started rejecting some emails with the following error
RejectMessage,550 5.7.1 Sender ID (PRA) Not Permitted,Fail_NotPermitted
Now I have been doing some research into it and most of the time it seems to point to the sender's server causing the issue, but I have just had some emails from British Airways be rejected by the server?
Is there something on the SBS server that I can check, I have added the email address to the allowed list as well as the IP address but still get the same error.
If anyone can help me out that would be great.