<div>
<div class="content wysiwyg-content">
I am using a Sophos Firewall and Exchange 2010 Server and I am discontinuing a domain and want an ndr/reject message &nbsp;to &nbsp;be sent to &nbsp;the sender that the e-mail is no longer valid.<br />
I am not sure where to make this happen.. do I discontune domain in Sophos have exchange send the NDr or what are the rules of the internet to where the message will be rejected.<br />
When I delete the domain in sophos I get a message bounce back that says relaying not allowed.<br />
I want the sender to get an email not valid message.<br />
Thanks
</div>
</div>


I am using a Sophos Firewall and Exchange 2010 Server and I am discontinuing a domain and want an ndr/reject message  to  be sent to  the sender that the e-mail is no longer valid.
I am not sure where to make this happen.. do I discontune domain in Sophos have exchange send the NDr or what are the rules of the internet to where the message will be rejected.
When I delete the domain in sophos I get a message bounce back that says relaying not allowed.
I want the sender to get an email not valid message.
Thanks

Decommision an email domain and have an ndr sent

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Sophos develops products for communication endpoint, encryption, network security, email security and mobile security as well as unified threat management. Products include hardware (or software virtual appliance) network firewalls including web browsing protection, AntiSpam filters and antivirus protection, encryption and data protection, web filter, antispam and mobile content and device management tools.