Installing the IIS SMTP Service on SBS 2008 Breaks Mailflow

The SBS Exchange Server 2007 Best Practice analysis gives a warning that ths IIS SMTP Server need to be removed as it is conflicting with the Exchange 2007 SMTP services.
A sympton of the problem is Non Delivery Reports to the sender of the email.
Found how to remove the feature here:
Installing the IIS SMTP Service on SBS 2008 Breaks Mail flow
http://blogs.technet.com/sbs/archive/2009/04/02/installing-the-iis-smtp-service-on-sbs-2008-breaks-mailflow.aspx
Server Manager
Remove Features
Untick SMTP Server
A sympton of the problem is Non Delivery Reports to the sender of the email.
Found how to remove the feature here:
Installing the IIS SMTP Service on SBS 2008 Breaks Mail flow
http://blogs.technet.com/sbs/archive/2009/04/02/installing-the-iis-smtp-service-on-sbs-2008-breaks-mailflow.aspx
Server Manager
Remove Features
Untick SMTP Server