Slightly OT: Greylisting success or failure stories?

[David Hoffman]

On Fri, 4 Feb 2005 09:17:29 -0600, David Hoffman <dhoffman2004 at gmail.com> wrote:
> On Fri, 04 Feb 2005 15:02:06 +0000, Paul Howarth <paul at city-fan.org> wrote:
> > David Hoffman wrote:
> > > That being said.... my intention, if I can find a viable solution, was
> > > to try using greylisting, followed by RBLs, and then possibly backed
> > > up with SpamAssassin or ClamAV. Basically take TMDA out of the picture
> > > altogether.
> > >
> > > The reason I was asking for information was not to start a C/R flame
> > > war. It was because some articles on greylisting talk about how
> > > non-compliant MTAs can break the greylisting system by NOT sending
> > > back legitimate messages after the delay, or by seeing the delay
> > > response as an error and reporting it back to the original sender.
> > >
> > > All I wanted to know is if anyone has seen issues like that and how to
> > > get around them.
> >
> > I think most of the issues you're likely to run into have already been
> > mentioned. If you keep an eye on your mail logs for a while after
> > implementing greylisting then you're likely to spot any problem.
> >
> > However, I think greylisting is only a short to medium term solution. As
> > soon as someone really big (e.g. AOL or hotmail) implements greylisting,
> > the spammers will evolve their software to handle it, and you'll be back
> > where you started. This isn't going to be a big problem for them, but
> > it's just not worth the effort for them at the moment, as relatively few
> > sites are using greylisting.
> >
> 
> OK.
> 
> These last two comments were basically what I was hoping for. This was
> not a thread for the pro/anti C/R issues.
> 
> Thank you Scott and Paul.
> 


OK Timing was off. It was comments from Scott and Paul that were
helpful. I am American too, but that has nothing to do with the topic.