I don't see the emails from the list.

[Jay R. Ashworth]

On Sat, Sep 29, 2007 at 08:52:21PM -0400, Kenneth Brody wrote:
> Quoting Jay R. Ashworth (Sat, 29 Sep 2007 20:33:20 -0400):
> > On Wed, Sep 26, 2007 at 09:46:50AM -0700, Bill Campbell wrote:
> >> Some ISPs are using ``grey listing'', a process in which messages
> >> are initially rejected with a 400 series SMTP message, later to
> >> be accepted.  The idea is that legitimate MTAs (Mail Transport
> >> Agents) will retry later while spammer's malware probably won't.
> >> This may result in delays sending messages to these ISPs.
> >
> > The definition of greylisting that I have seen (and which I use, and
> > which doesn't work all that well anymore) is to put a higher-priority
> > MX pointed at a machine that doesn't accept incoming TCP/25 -- or
> > better yet, behind a firewall which ignores it.
> 
> I haven't seen that definition before.  What I've seen is the same
> as Bill's.  The basic idea is that it's somewhere between blacklisting
> (refuse everything from it outright) and whitelisting (accept everything
> from it without filtering).  Hence the name "greylisting".

Forgive me: I'm "nolisting":

	http://nolisting.org/

In theory, yes, it ought to delay all incoming mail; in practice, I
haven't had a problem; that first "try another MX" step apparently
happens reasonably quickly on most MTAs.

Cheers,
-- jra
-- 
Jay R. Ashworth                   Baylink                      jra at baylink.com
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