1) In the recordset, the name of the email form variable is "Email_Address" not "email"
2) Do not create a new Server validation server behavior, my instructions where to edit the existing one.
3) The server variable to use for the numeric validation is:
in your case this is:
we are not using the value from the recordset, we are trying to validation the the recordset does not return any rows.
we do this by using the $totalRows_rsEmail variable which contains the number of rows.
this needs to be between -1 and 0, in other words: empty, meaning the email address is not found.