If you create a DTS package and add a Send Mail task, you can select only
one address at a time as the recipient from the Address Book. In the Send
Mail Properties window for the DTS package, if you click the To... button
in the To field to open the Address Book and select two or more names, only
the first name is added to the field.
You must select one recipient at a time for the Send Mail task. Each new
recipient will be added to the existing list of recipients.
Microsoft has confirmed this to be a problem in SQL Server 7.0. This problem has been corrected in U.S. Service Pack 1 for Microsoft SQL Server 7.0. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
INF: How to Obtain Service Pack 1 for Microsoft SQL Server 7.0 and Microsoft Data Engine (MSDE) 1.0
For more information, contact your primary support provider.