configuring sendmail to reject spoofed email addresses

[Donald Tyler]

Hi,

Like everyone else, our junkmail is getting horrendous. Most of the emails
we receive use an email for the "From" section of the header, but it doesn't
match the email in the "Return-Path" section.

My question is this:

Is there anyway to configure sendmail so that if there is an email address
in the "From" section, and it does not match the "Return-Path" section, for
it to reject the email?

Thanks in advance


Donald Tyler