Hiya, I setup a SBS2011 installation at home and changed the DNS at my ISP for the FQDN to point at my home static IP. I set it up at it all works mostly fine at least email did. I have now moved it to the office site where it will live and work, I setup the ISP as the mail.relay and changed the DNS so all good, and setup an mx record, but now all emails bounce back apart from the ones to the FQDN quoting amongst other things x-originating-ip xxx.xxx.xxx.xxx which is my static IP at home... How do I change this I think if I change this record in Exchange all will be well again any ideas? Thx Christian

The originating IP address should not be the cause of the rejects because that is just an information line. What does the actual NDR say? Have you checked that your ISP will allow you to relay through their servers and doesn't require authentication? Don't call them and ask about Exchange, as they will just say they don't support that. All you need to know is whether when sending email only you need to authenticate. A lot of ISPs will be setup so that when you do a Send/Receive (ie POP3/SMTP) it allows the messages to be sent, because the authentication has already occurred, but a Send only stream requires authentication. Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.

Hi, Please post the NDR that may helpPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Thanks Gen Lin-MSFT