hope that your shitty client side email protection/filtering does its job. client side being this, something like it or thunderbirds bayiesien(? its late and im tired, sod spelling) filters start picking up the new patterns.
or, your isp/email provider starts tuning their middle tier filtering (spamassasin et al). i guess webmails such as hotmail or gmail are running similar or like technology so no need to worry too much