How do I change email sender when mail merging

I use Microsoft Outlook Professional 2003 for email.
I have 2 email addresses, one primary & one sub account.
In mail merge I cannot find a way to change to the sub account for sending
merged documents out of Microsoft Word Professional 2003.
They continue to go out of primary email address.
Any thoughts

You will need to set the sub account as the default email account

You will need to set the sub account as the default email account when
executing the merge.

--
Hope this helps.

Please reply to the newsgroup unless you wish to avail yourself of my
services on a paid consulting basis.

Doug Robbins - Word MVP, originally posted via msnews.microsoft.com