In message <20040222133745.53A882946A@grok.beer.org>, Herb Peyerl writes:
>Sun, 22 Feb 2004 07:22:03 -0600.
>             <200402221322.i1MDM3Nr014275@guild.plethora.net> 
> > Yes, it does.  There is no sysadmin incapable of providing valid reverse
> > DNS, and this simple filter gets rid of a very large quantity of spam.
>
>I'm a sysadmin and I don't have authority for some of the address space for
>some of my machines coloed in some facilities.  Does this reflect poorly on
>me as a sysadmin or does it reflect poorly on you for making grand and 
>baseless assumptions?

A bit of both.  :)

In my experience, even if you can't do it directly, it seems to just about
always be possible to ensure that mail comes out with valid and matching
reverse DNS.  It may require leaning on a meta-sysadmin, but it's generally
doable.

We're also reaching the point where measures like this are becoming more
palatable simply because the volume of legitimate mail lost to them is lower
than the volume of legitimate mail lost to not having them...

-s