Sending Mail Merge to Email to Multiple Recipients in the Same Mes

Is there a way to send a single email message to multiple recipients
simultaneously so that all of these recipients appear in the "To:" field for
this message rather than sending the message separately to each individual?
This would be useful when send email to a group of owners for a certain
product, project or service as opposed to sending individual messages to each
or for sending a message to a specific individual and their manager or
administrative assistant.

I have tried creating a Mail Merge field consisting of several email
addresses (comma-delimited and semicolon-delimited lists of SMTP addresses or
Outlook Address Book Display Names) and selecting this field as the "To:"
field in the Merge to E-mail Message Options but it doesn't work.

Summary of results:

- Using comma-delimited SMTP email addresses results in a Check Names error
messsage which indicates that Outlook doesn't recognize the comma-delimited
SMTP email addresses and suggests replacing the commas with semicolons.

- Using semicolon-delimited SMTP email addresses results in a Check Names
error messsage which indicates that Outlook doesn't recognize the
semilcolon-delimited SMTP email addresses.

- Using semicolon-delimited Display Names from the Outlook Address Book
(Personal or Global) results in a Check Names error messsage which indicates
that Outlook doesn't recognize the semilcolon-delimited SMTP email addresses.

I am using Microsoft Office Word 2003 (11.5604.5703) and Microsoft Office
Outlook 2003 (11.5608.5703) from Microsoft Office Professional Edition 2003.

Any guidance is appreciated.

Thanks, Mark V