>> On 26.05.10 07:01, Sam Varshavchik wrote:
>>> All of this incurs non-trivial per message overhead. Issuing a DNS 
>>> query, and/or querying the local account database, is not free, and 
>>> the penalty  now applies to every message. A judgement call needs to 
>>> be made whether the additional overhead is justified by the value 
>>> added.

> Matus UHLAR - fantomas writes:
>> I'm aware of all of this. However all (except sender address verification)
>> the overhead will still happen, but later in delivery chain, in which case

On 28.05.10 18:08, Sam Varshavchik wrote:
> A second time. Twice as much overhead, now.

since there's e.g. more spam than ham, I still find many checks at SMTP time
as win.

>>> As the old saying goes: build an idiot-proof process, and nature will 
>>> evolve a better idiot.
>>
>> Do you mean we shouldn't build idiot-proof processes because of this?
>
> A completely idiot-proof solution is often impossible. Nearly all the 
> time this is reduced to a judgement call, whether the extra bang for the 
> buck is worth the additional penalty.

well, I'm guessing it is worth it. Seems you are guessing the oposite...
but it's hard to judge without trying it.

I hope that the courieresmtpd code is easy enough to patch for this
functionality...
-- 
Matus UHLAR - fantomas, [email protected] ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
Christian Science Programming: "Let God Debug It!".

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