how to block a specific external recipient?

[unslog]

Hi

Please can you advise best method of restricting users from sending emails to a specific external address, without the sender receiving NDR e.g.

You do not have permission to send to this recipient. For assistance, contact your system administrator. <domain.com #5.7.1>

At the moment I have created a contact with Message restriction, but sender receives NDR. Also do not want to turn on Intelligent Message Filter.

 

[ShackDaddy]

Add it as an SMTP address on the Admin account?

Dave Shackelford
ThirdTier.net