Author: David Woodhouse Date: To: Robert Millan CC: exim-dev Subject: Re: [exim-dev] [PATCH] Implement redirect
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 <foo@???>
>
> 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 foo@??? > ~/.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.
