disable send email

I have designed a spreadsheet which gets populated by many people, I have created a send e-mail button, which validates the data on the sheets, before it allows them to send.

I am getting a problem where some people bypass the button and go through the file...send to ... mail recipent as attachment.

My question is - is there any way to stop them doing that?

You could disable the "Send to..." menu item for that workbook using the CommandBars collection. ;)