"450 Host Down" errors GWIA on Windows 2008

  • 7005218
  • 25-Jan-2010
  • 26-Apr-2012


Microsoft Windows Server 2008
Novell GroupWise 8
Novell GroupWise 8 Internet Agent


When sending an outbound email with GWIA running on Windows 2008 Server, GWIA does not resolve DNS correctly and immediately shows a "450 Host Down" error (for the domain name of the recipient) when trying to send the message.
In Diag log mode, GWIA also shows a "No MX records found" error for each outbound message.


  1. Right-click My Computer
  2. Go To Properties
  3. Click on Change settings >  Change
  4. Go to the  More tab then put the email domain name (such as "novell.com") in the "Primary DNS suffix of this computer" box.