Re: greylisting on debian.org?
On Tue, Jul 11, 2006 at 08:48:43PM +1000, Hamish Moffatt wrote:
> 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.
Some sites verify the sender_address@example.org and
postmaster@example.org addresses before accepting mail with sender
sender_address@example.org .
--
Lionel
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