Hi Lawlor,
To set Outlook Express as your default Simple MAPI client, quit all other
running e-mail programs, and then follow these steps in Outlook Express:
Outlook Express 4.x and Windows 98
On the Tools menu, click Options.
On the General tab, click the Make Outlook Express my default Simple MAPI
client check box to select it.
Click Yes when you are prompted to set Outlook Express as your default
Simple MAPI client.
NOTE: If you use another MAPI-enabled e-mail program such as Microsoft
Exchange, Microsoft Outlook 97, or Microsoft Windows Messaging, it is no
longer your Simple MAPI client when you set Outlook Express as your default
Simple MAPI client. To set your other e-mail program as the default Simple
MAPI client, click the Make Outlook Express my default Simple MAPI client
check box to clear it.
Click OK, and then click OK again when you are prompted to restart your
computer.
Quit Outlook Express, and then restart your computer.
Outlook Express 5
On the Tools menu, click Options.
On the General tab, click Make Default next to This application is the
default mail handler.
Click OK.
For Further Information : Microsoft Knowledge Base Article - 178077
http://support.microsoft.com/default.aspx?scid=kb;en-us;178077
Please let me know has this helped You...
Thank You...
Raghu...
This posting is provided "AS IS" with no warranties, and confers no rights.