Re: WG to close ; Re: Make CSV backwards compatible with SPF? (new revisions)

Great.  Thanks for the feedback.

What sort of 2821.MailFrom validation was PostFIX doing back in 99?

So we have:

Exim SMTP server
PostFix SMTP server
WIldcat! SMTP server

all doing MAIL FROM delayed validation.  How about SendMail?

Sincerely,

Hector Santos, CTO
Santronics Software, Inc.
http://www.santronics.com
305-431-2846 Cell
305-248-3204 Office



----- Original Message -----
From: "Wietse Venema" <[email protected]>
To: <[email protected]>
Sent: Friday, September 24, 2004 12:26 PM
Subject: Re: WG to close ; Re: Make CSV backwards compatible with SPF? (new
revisions)


>
> Hector Santos:
> > See RFC 2821 Section 3.3:
> >
> > | 3.3 Mail Transactions
> > |
> > |    .....
> > |
> > |   .............  Despite the apparent
> > |   scope of this requirement, there are circumstances in which the
> > |   acceptability of the reverse-path may not be determined until one or
> > |   more forward-paths (in RCPT commands) can be examined.  In those
> > |   cases, the server MAY reasonably accept the reverse-path (with a 250
> > |   reply) and then report problems after the forward-paths are received
> > |   and examined.  Normally, failures produce 550 or 553 replies.
> >
> > This is probably the most powerful concepts in RFC 2821 for anti-spam
> > operations.  It opens the door for Mail From Validation and it offers
> > performance enhancement and overhead reductionn.  We are probably among
the
> > first, if the the only product in the market to have implemented this
> > recommendation.
>
> The Postfix MTA does this by default since 19990510 (May 10, 1999),
> according to the day-to-day log.
>
>  Wietse
>
>