Waiver of Attorney Client Privilege - Header

All of us have read the following disclaimer or something similar at the end of e-mail messages.

The information contained in this message may be protected by the attorney-client privilege. Please immediately reply to the sender of this e-mail if you have received it in error, then delete it. Thank you.

I would suggest that such a disclaimer be inserted at the beginning of the e-mail to alert an individual before reading the e-mail. It would seem that after reading the e-mail and then reading the disclosure - that the bell has already been rung.

For electronic discovery and electronic evidence purposes, the insertion of the header at the beginning would support an argument of nonwaiver of the attorney/client privilege.