On Wed, Feb 17, 1999 at 09:17:33PM -0800, Michael Graff wrote:
> Perhaps he means "valid return envelopes"

Yeah. Or the no DNS entry thing from Claus Assmans anti-spam rules:

# no DNS entry? this is dangerous!
R$*<@$*$~P>$*  $#error $@ 4.1.8 $: 418 unresolvable host name $2$3, check your configuration.  

However something must be done.

-- 
          See <a href="http://www.netbsd.org">NetBSD</a> for a multiplatform OS
" Das ist wie ein Telefonbuch -- viele Personen und wenig Handlung "
          Prof. Deussen am 26.10.94 ueber die Syntax von PL1