RE: DEPLOY: Permitting '-all' to be used immediately representsaflagday.

[<terry@xxxxxxxxxxxxxxxxxxxx>]

> -----Original Message-----
> From: owner-ietf-mxcomp@xxxxxxxxxxxx
> [mailto:owner-ietf-mxcomp@xxxxxxxxxxxx]On Behalf Of Tony Finch
> Sent: Wednesday, September 15, 2004 12:13 PM
> To: terry@xxxxxxxxxxxxxxxxxxxx
> Cc: ietf-mxcomp@xxxxxxx
> Subject: RE: DEPLOY: Permitting '-all' to be used immediately
> representsaflagday.
>
>
>
> On Wed, 15 Sep 2004 terry@xxxxxxxxxxxxxxxxxxxx wrote:
> >
> > Another way of looking at it is, if the receiver wants to
> forward other
> > (valid) email address(es) to his/her actual email address,
> the onus is
> > on the recipient to ensure that the MTA doing the forward on his/her
> > behalf has the necessary mechanisms.
>
> Most recipients are not capable of doing so, and most
> forwarding sites do
> not have the necessary mechanisms. The necessary mechanisms
> either do not
> work adequately (in the case of /pra) or

Agreed, I don't like PRA, it seems dumb perform tests on something that can be forged anyway.

> are problematic (in the case of
> /mailfrom).

Problematic does not mean without resolution.  I have heard solutions (although have not implemented
any yet).

>
> > If it does not then either accept the risk of rejected
> email OR strive
> > to get the sender to send to the final email address directly.
>
> The point of using a forwarding address is to have a stable
> email address

Agreed, I have many email addresses, and I too will have to ensure the forwarding is done by
compliant servers (or move the forwarding elsewhere).

> independent of the final destination. It's a huge pain to
> have to update
> everyone's address books every year or two.

I know.  It's also a pain to be flooded with emails with forged from domain.

>
> > -if the sender a person, then an auto reply on the account saying
> > (please now use my direct address to contact me) should suffice
>
> Backscatter is part of the problem not part of the solution.

Agreed.  I am already flooded with bounces and crap from failed delivery, viruses etc.  PRA may
cause some backscatter, but it has the potential to block a whole bunch (viruses usually include an
SMTP engine so they don't need to relay through a real MTA, hence 1 hop, hence no backscatter on
rejection before DATA).

BTW I don't endorse PRA because (amongst other things) the backscatter issue.

But I am voting for Classic SPF which does not have a backscatter issue (please correct me if I am
wrong).

Terry


>
> Tony.
> --
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