A program is trying to send mail using Item.Send

A program is trying to automatically send an e-mail message using a Microsoft Visual Basic Application (VBA) command, Item.Send, from within Microsoft Outlook. If you want this program to send this message, click Yes. To stop the program, click No. If you are unsure which program is sending the message or why the message is being sent, you should click No to help avoid the possible spread of viruses.

Note  When this message is displayed, the Yes button is not available for five seconds.