This could be also of interest. Although it is old (feb 99), most of its recomendations are valid. Others have not yet come to a consensus, like using 4xx error codes instead of 5xx for denying spam. Anyway, it instigates more profund analysis from the mail admin.
http://www.faqs.org/rfcs/rfc2505.html What are your thoughts, readers? > > On Wed, 23 Jun 2004 11:45:40 +0200, Niccolo Rigacci <[EMAIL PROTECTED]> > > wrote: > > > > > Please correct me if I'm wrong; I'm searching for RFCs which > > > propose effective ways to block spam and viruses. > > > -- Yves Junqueira www.lynx.com.br