I'm getting complaints from a remote user.
He receive an error while sending mails to outside of our domain. for example- gmail.com addresses
the error that he receives is:
554 5.7.1 <gilmorofk@gmail>: Relay access denied
I understand what is an open relay and our server is not an open relay.
but this is new errors. until a week ago it was working perfectly.
Thanks in advanced.