On Wed, 2006-06-28 at 20:18 +0200, Robert Millan wrote:
> Hi!
> 
> The attached patch implements code 551 as described in RFC 2821 section 3.4.
> 
> The idea is that the originator MTA is told via DSN which address is the final
> destination of this email, instead of transparently forwarding it.
> 
> The following code is returned by server:
> 
>   551 User not local; please try <[EMAIL PROTECTED]>
> 
> The main advantage with this is that it circumvents problems originated with 
> SPF
> and forwarding.
> 
> In order to activate it, system users just need to:
> 
>   echo [EMAIL PROTECTED] > ~/.redirect

Cute idea, but I don't like the implementation much -- it would be
better for it to be available in a general fashion from ACLs. In
particular, if I were to use it I'd want to use it _only_ for senders
which are known to be SPF-afflicted. Those who didn't choose to break
their email shouldn't get the 551 error.

-- 
dwmw2


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