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Re: Greylisting for @debian.org email, please

On Mon, Jun 20, 2005 at 08:48:05AM -0700, Thomas Bushnell BSG wrote:
> Wouter Verhelst <wouter@debian.org> writes:
> > On Sat, Jun 18, 2005 at 02:30:50PM -0700, Thomas Bushnell BSG wrote:
> >> Since delays could be weeks from graylisting--or worse--yes.  
> >
> > Uh, no. If properly configured, graylisting will not produce such
> > delays.
> If I have an email farm of dozens of servers, so that each time the
> message is sent, it comes from a different server, graylisting can
> take an extremely long time.  Since you do not have a complete list of
> every mail server that does this, you cannot avoid the problem.

The number of email domain that needs such a setup is rather small
(probably only the hotmails, and AOLs of this world), so you could make
an educated guess.

That being said, even if you couldn't do that, there still are ways to
avoid the problem: e.g., do graylisting based on the /24 of the sending
host, rather than on the /32, and make the delay only valid for five
minutes rather than an entire hour. This might still make the delay be
quite some time, but it shouldn't take /weeks/, at any rate.

The amount of time between slipping on the peel and landing on the
pavement is precisely one bananosecond

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