>Jordan
>
>Thanks for your comments.
>
>I want to be able to check the validity of the email address itself (does this email address actually exist?). I know its possible as there is software out there but I cant hook it into VFP.
>
>Much of the SPAM I am dealing with is not cc or bcc but a message to a single recipient coming from an ever changing email address. Perhaps you dont regard this as SPAM.
>
>Thanks
>
>Colin

In this case you should compare subject or better body of e-mail. If you already have the body in your database this should be a spam.
There are not problem to register valid e-mail address from a lot of free servers. and to use them.