Author: Robert Millan Date: To: exim-dev CC: Tony Finch Subject: Re: [exim-dev] [PATCH] Implement redirect
On Fri, Jun 30, 2006 at 09:30:40AM +0100, Philip Hazel wrote: > On Thu, 29 Jun 2006, Tony Finch wrote:
>
> > On Thu, 29 Jun 2006, Robert Millan wrote:
> > >
> > > Besides, in the long term, this should get better. After all, 551 is a
> > > standard response defined in RFC 2821. I don't see why any MTA wouldn't
> > > want to support it in the sender side.
> >
> > Because it has been obsolete and unsupported for decades. There are lots
> > of features in old IETF protocols which are vestigial remnants that have
> > almost never been used.
>
> I also do not believe that "this should get better". If MTAs were going
> to implement this, they would have done so long ago. After all, the 551
> code is defined in RFC 821, which was published in 1982, nearly a
> quarter of a century ago.
But times have changed; spam has never been as much significant as it is today.
(and the two main advantages of using code 551 are somehow spam-related)
