[Mimedefang] Deadline for SPF records *long w/morbid horoscope*

[Jeff Rife]

On 9 Aug 2004 at 21:03, Kevin A. McGrail wrote:

> > If the receiving MX servers always knew all valid recipient addresses
> > *at (E)SMTP connection time*, then there would be no bounces...only
> > rejections.
> >
> > This solves the problem without introducing anything new to (E)SMTP.
> 
> At the core, this solution ignores the concept and purpose of a backup MX
> which is a reality and necessity for many companies where email is critical.

There is no reason a backup MX server can't know if an address is valid 
or not.


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