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Re: greylisting on debian.org?

On Tue, Jul 11, 2006 at 08:56:52AM +0200, Lionel Elie Mamane wrote:
> On Mon, Jul 10, 2006 at 06:28:40PM +0100, Stephen Gran wrote:
> > This one time, at band camp, Henrique de Moraes Holschuh said:
> >> On Mon, 10 Jul 2006, Adrian von Bidder wrote:
> >>> As I know it, the receiving MX connects the regular MX for the
> >>> sender address to see if *that* is ready to receive mail.  Works
> >>> beautifully if outbound != inbound.
> >> And sets the envolope sender to what in the probe?
> > <>, hopefully.  Anything else is silly.
> Yes and no. An increasing number of sites refuse "bounces" (that is
> messages with null return-path) to some addresses that are known never
> to send mail. This breaks the procedure and is reacted by other sites
> by using a fixed "just-probing-here@their_domain" address, and mail to
> that address doesn't incur that check (but ends up in /dev/null or
> gets refused at DATA time).

That doesn't add up. Since <> never sends mail, there will never be a
sender verification callback TO that address either. What's the problem?

Likewise if you refuse bounces to other inbound-only addresses, you
should never get inbound probes. That is kind of the point. 

Hamish Moffatt VK3SB <hamish@debian.org> <hamish@cloud.net.au>

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