Re: [exim] Greylisting - Chnging IPs

On Thu, 8 May 2008 12:39:41 +0200 Warren Baker <warren@???> wrote:

> On 07/05/2008, Grant Peel <gpeel@???> wrote:
> >
> >
> > I have recently implimented greylist on some of our servers, and am seeing
> > a
> > few domain, that return multiple IP address. How is that handled.
> >
> > I am also seeing a few (like telus.net) that resend mail from a different
> > mail server than the original. How do we handle that?
> >
> > I have my accept time set to 2 minutes. Does anyone think thats too long?
>
>
>
> GMail uses multiple fallback servers, as an example [a-z]proxy.gmail.com so
> you will see mail not been delivered from their servers if greylisting is
> enabled. As Heiko has mentioned he uses just the sender and recipient
> address as the condition. What you can also do is just add the /24 network
> for the connecting host into your condition instead of the hosts sending
> address. This would cater for GMail and many others.
>
> You could also defer after the DATA has finished. You will now have the
> message ID which you could use as part of your checks.
>
>
> Warren

The message ID is not a mandatory header, so that could be a problem. I use
the date header, which is mandatory. (You could opt to substitute the body size
if the date is missing.)

Phil.
---------------------------------------
Phil Chambers (postmaster@???)
University of Exeter