Clicking ‘Connect To This Discussion board’ in SharePoint alert email gives error (0×800401F3)

When using Exchange 2003 with Outlook 2007, when you click ‘Connect To This Discussion board’ from a SharePoint alert email, you receive the following error:
Outlook Send/Receive Progress! Task ‘SharePoint’ reported error (0×800401F3) : ‘Unknown Error 0×800401F3′

Cause:-
Certain headers are encoded by SharePoint which Exchange 2003 does not decode. Exchange 2007 does decode these headers and the issue does not occur with Exchange 2007.

Resolution:-
Upgrade to Exchange 2007 to resolve this issue.

APPLIES TO:-
-Microsoft Exchange Server 2003 Standard Edition
-Microsoft Exchange Server 2003 Enterprise Edition
-Microsoft Office SharePoint Server 2007