If you use Outlook and IVM to send email notification you may get the Outlook pop-up message that requires you to click OK for it to continue.
Here is a link to a program that stops the pop-up message.
http://www.contextmagic.com/express-clickyes
There is a free and a paid version.
With the free version the message flashes and the email goes out with no clicking.
With the paid version it hides all activity and the email goes out with no clicking.
I use you free version and it works for me on Outlook 2003, Outlook 2000 with all patches and Outlook XP.
JayTB