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.
--
Philip Hazel University of Cambridge Computing Service
Get the Exim 4 book: http://www.uit.co.uk/exim-book
